MICROSOFT SURFACE LAPTOP 4 1959 (01) PDF Document

The service guide covers the following Microsoft Surface Laptop models:

Surface Laptop 3 Models:

1867 – Surface Laptop 3 – 13.5″ (Fabric type keyboard)

1868 – Surface Laptop 3 – 13.5″ (Metal type keyboard)

1872 – Surface Laptop 3 – 15″ (Metal type keyboard)

1873 – Surface Laptop 3 – 15″ (Metal type keyboard)

Surface Laptop 4 Models:

1950 – Surface Laptop 4 – 13.5″ (Fabric type keyboard)

1951 – Surface Laptop 4 – 13.5″ (Metal type keyboard)

1953 – Surface Laptop 4 – 15″ (Metal type keyboard)

1958 – Surface Laptop 4 – 13.5″ (Fabric type keyboard)

1959 – Surface Laptop 4 – 13.5″ (Metal type keyboard)

1979 – Surface Laptop 4 – 15″ (Metal type keyboard)

The model and serial number for Surface Laptops are located on the bottom center of the device, closest to the display hinge point.

The following terms are used when servicing your MICROSOFT SURFACE LAPTOP 4 1959:

ASP: a Microsoft Authorized Service Provider who performs repair services on behalf of Microsoft under an ASP Agreement.

Commercial Spares/CRU: Customer Replaceable Units available to commercial customers for repair by a skilled-technician.

feet or foot: Non-Skid Foot Pads.

C-cover: Keyboard Trackpad Assembly.

rSSD: Removable Solid-State Drive.

AB-cover: Display Assembly or AB-Cover Display Assembly.

BMR: Bare Metal Recovery refers to the clean imaging process.

chassis or D-chassis or D-bucket: Device bottom case.

SDT: Surface Diagnostic Toolkit.

ESD: Electro-Static Discharge.

FPC: Flexible Printed Circuits connections.

FRU: Field Replaceable Units are sub-system components such as the C-cover, AB-cover, and rSSD. FRU are available only to ASPs. Some replaceable units will only be available as FRUs and therefore are only supported at an ASP.

IPA: Isopropyl alcohol which should be used to clean adhesive from device as detailed within process steps. Use 70% IPA in all cases.

The following tools are recommended for servicing your MICROSOFT SURFACE LAPTOP 4 1959:

Microsoft Recommended Service Jigs:

ESD-safe battery cover

Microsoft Provided Software Tools:

Software Tool – AB-cover Touch Calibration tool

Surface drivers and firmware

Surface Diagnostic Toolkit (SDT)

Surface Data Eraser

Surface Imaging Tools

Standard Service Tools:

Anti-static wrist strap (1 MOhm resistance)

ESD-safe benchtop

Surface Laptop Power Supply

USB hub (3 ports required)

USB keyboard (standard PC keyboard)

USB mouse (standard PC mouse)

Standard PC monitor with HDMI or DVI input

Mini-DP port to HDMI/DVI dongle

Spudger tool

Clamps (2), 50.8mm (2 in) spring

Torx plus drivers 3IP,5IP,6IP

Isopropyl alcohol dispenser bottle (use 70% IPA)

Cleaning swabs

ESD-safe tweezers

Guitar pick opening tool

Heavy duty suction cups (2) – 57.15mm (2.25 in)

Plastic feeler gauge – 0.40mm

Plastic feeler gauge – 0.50mm

Plastic feeler gauge – 0.050mm

Always observe the following general safety precautions when repairing your MICROSOFT SURFACE LAPTOP 4 1959:

Opening and/or repairing any electronic device can present a risk of electric shock, fire, serious personal injury, death, damage to the device or other property, and/or other hazards. Exercise caution when undertaking repair activities.

Improper use or handling of devices or their batteries may result in fire or explosion. Only open the enclosure on a device as outlined in this guide.

Do not heat, puncture, mutilate, or dispose of devices or their batteries in fire. Do not leave or charge devices in direct sunlight or expose devices or their batteries to temperatures outside the recommended operating range of 0° C to 60° C / 32° F to 140° F for an extended period. Doing so can result in battery failure, electric shock, fire, serious personal injury, death, and/or damage to the device or other property.

We recommend wearing protective eyewear and gloves when disassembling/re-assembling a device.

WARNING: Before opening a device, ensure it is powered off and disconnected from its power source. Disconnect the device charger or power cord from mains power.

For devices with rechargeable lithium-ion batteries that power on, fully discharge the battery before beginning repair. To expedite the battery discharge process:

Disconnect the charger from the device.

Increase display brightness to the highest level.

Turn on wi-fi and Bluetooth.

Open the Camera app in Windows.

Play music or video files from a local drive or streaming service.

Operate the device in this mode until the battery is fully discharged and the device powers off.

WARNING: For Surface devices where the battery is affixed to the back cover, place the back cover with the battery in a location where it will be protected from possible punctures, impacts, crushing, or drops during the repair process.

Ensure your work surface is level/flat and covered with ESD-safe, soft, non-marring material.

We recommend wearing protective eyewear as a safety precaution when disassembling/re-assembling a device.

Clean your work surface regularly to remove debris and abrasive particles.

Before opening a device, always wear an anti-static wrist strap and confirm your work area is properly grounded to protect vulnerable electronics from electrostatic discharge (ESD).

Parts removed from a device during the repair process should be stored in ESD-safe bags and packaged for return or recycling in the same packaging that the new replacement part came in.

If battery damage (e.g., leaking, expansion, folds or other) is discovered during device repair or if the battery is impacted or damaged during replacement, DO NOT proceed.

As you remove each subassembly from the device, place the subassembly (and all accompanying screws) away from the work area to prevent damage to the device or to the subassembly.

During all activities (excluding feet-only replacement) check to ensure that no loose articles are on the back cover or remain inside the device before reassembling it.

IMPORTANT: Remove rSSD (removable Solid-State Drive) whenever C-cover is removed from device. rSSD removal disconnects the battery from all device logical components for safety purposes.

IMPORTANT: Whenever the rSSD has been removed, powering on the device requires that the rSSD and C-cover are installed.

Device Serial Number Notation – The Surface device serial number for this model is located on the bottom of the chassis. When the chassis is replaced during service/repair, the device serial number becomes physically disconnected from the customer’s device. To ensure the customer has the best experience if any future support is required, it is recommended to create a notation of the device serial number and provide it to the customer upon completion of the repair.

This device contains a built-in, lithium-ion rechargeable battery. Battery safety is a significant concern when repairing a device. Use the following best practices when handling batteries:

Always fully discharge batteries by running an application such as video playback with the device unplugged. If the device does not function while unplugged, you may leave out this step.

Do not puncture, impact, strike, bend, or crush the battery or a device containing a battery.

Keep your workspace clear of debris, extra tools, and sharp objects.

Exercise caution when using sharp tools near the battery to avoid impacting or poking the battery.

Don’t leave loose screws or small parts inside the device.

Avoid using tools that conduct electricity.

Do not drop or throw a lithium-ion battery.

Do not expose the battery to excessive heat, sunlight, or temperatures outside the battery’s normal operating range (0°C to 60°C)/(32°F to 140°F).

Ensure you handle, recycle, and/or dispose of used or damaged batteries in accordance with local laws and regulations.

If device repair cannot be completed immediately and the device needs to be stored temporarily before restarting the repair:

Select a storage location and process that follows the battery safety precautions in this Guide.

Avoid exposing the device to environmental conditions and objects that could damage the battery pack.

Reinspect the battery pack as outlined in this Guide prior to restarting repair and installing the new battery pack.

Upon opening the device, it is recommended that you visually inspect the battery for signs of damage. Factors to consider when inspecting the battery include, but are not limited to:

Evidence of leaking or venting.

Visible signs of physical or mechanical damage, such as:

Expansion or swelling. In expanded or swollen batteries, the soft pouch encasing the cell pulls away from the inner material and appears baggy, loose, or puffy.

Discoloration of the battery casing.

Odor, smell, or visible corrosion. Leaked battery electrolyte smells like nail polish remover (acetone).

Dents along the battery cell edges or on the top surface.

Surface scratches that have exposed the aluminum beneath the black coating layer on the battery.

Loose or damaged wires.

Known misuse or abuse.

Any battery exhibiting the signs listed above must be replaced.

DO NOT dispose of used lithium-ion batteries, whether damaged or not, in household or commercial garbage or recycling bins.

WARNING: DO NOT SHIP DAMAGED OR DEFECTIVE BATTERIES ALONE OR INSIDE DEVICES. Damaged or defective batteries and devices containing damaged or defective batteries require special packaging and handling. Prior to transport:

Follow all instructions provided by your local e-waste recycling or household hazardous waste collection provider.

Place the device or battery in an individual, non-metallic inner packaging, such as a zip-to-close plastic bag, that completely encloses the device or battery.

Surround the inner packaging with non-combustible, electrically non-conductive, absorbent cushioning material.

Each damaged battery or device containing a damaged battery should be packed individually in its own carton and that carton should be clearly marked as containing a damaged battery.

A thermal event is a rapid chemical chain reaction that can occur inside a battery cell. Act immediately if you see any of the following symptoms of a battery thermal event:

Smoke, soot, sparks, or flame emitted by the battery or from a device containing a battery.

The battery pouch suddenly expands in size.

A popping or hissing noise from the battery or a device containing a battery.

Actions to take:

DO NOT use water. Immediately smother the battery or device with clean, dry sand, a fire blanket, or an appropriate (Class B) fire extinguisher. If using sand, dump the sand all at once until the device is completely covered.

Contact local fire authorities if further assistance is needed.

Exit the work area and ventilate it until it is clear of smoke.

Wait at least 2 hours before attempting to touch the device.

Dispose of the damaged battery or device in accordance with local environmental or e-waste laws and guidelines.

If your MICROSOFT SURFACE LAPTOP 4 1959 visually exhibits any of the following symptoms, cease all further repair efforts:

Any burned or melted components, traces, or plastic parts on the outside of the device, or which otherwise exhibits heat damage, including charring seen in charging and other ports.

Any burned or melted components, traces, or plastic parts on the inside of the device, or which otherwise exhibits heat damage.

Any accessories exhibiting melting or heat damage that are included with the Microsoft device, such as power supplies, keyboards, mice, cables, charging connectors, etc.

Any devices that exhibit a case that has separated apart or opened for reasons other than impact damage from dropping, evidence of tampering, or separation caused by a malfunctioning battery.

Any other finding that may constitute a safety hazard to the user, such as sharp edges on plastics.

Service part availability is segmented into two groups. FRUs are parts available for repair activity through an Authorized Service Provider under specific contract with Microsoft. CRUs/Spares are parts available for repair activity by a skilled technician.

Non-Skid Feet

Component	Part No.	1867	1868	1872	1873	1950	1951	1953	1958	1959	1979
Feet Black	CIG-00001		X	X	X		X	X		X	X
Feet Cobalt Blue	CIG-00005	X
Feet Platinum	CIG-00002	X		X	X	X		X		X	X
Feet Sandstone	CIG-00004		X				X			X
Feet Ice Blue	CIG-00003					X			X

C-cover Keyboard Assembly (Metal or Fabric)

Component	Part No.	1867	1868	1872	1873	1950	1951	1953	1958	1959	1979
C-cover screws		X	X	X	X	X	X	X	X	X	X
C Cvr 13.5″ AMER/ASIA Black	RPQ-00001		X				X			X
C Cvr 13.5″ Mexico Black	RPQ-00069		X				X			X
C Cvr 13.5″ Japan Black	RPQ-00003		X				X			X
C Cvr 13.5″ French Canadian Black	RPQ-00002		X				X			X
C Cvr 13.5″ Korea Black	RPQ-00004		X				X			X
C Cvr 13.5″ Thailand Black	RPQ-00005		X				X			X
C Cvr 13.5″ Taiwan Black	RPQ-00006		X				X			X
C Cvr 13.5″ BH/KW/OM/QA/SA/AE Black	RPQ-00007		X				X			X
C Cvr 13.5″ UK/Ireland Only Black	RPQ-00008		X				X			X
C Cvr 13.5″ Netherlands Poland Black	RPQ-00009		X				X			X
C Cvr 13.5″ Austria Germany Black	RPQ-00010		X				X			X
C Cvr 13.5″ France Black	RPQ-00011		X				X			X
C Cvr 13.5″ Switz/Lux Black	RPQ-00012		X				X			X
C Cvr 13.5″ Blgm Black	RPQ-00013		X				X			X
C Cvr 13.5″ Italy Black	RPQ-00014		X				X			X
C Cvr 13.5″ Portugal Black	RPQ-00015		X				X			X
C Cvr 13.5″ Spain Black	RPQ-00016		X				X			X
C Cvr 13.5″ DK/FI/NO/SE Black	RPQ-00017		X				X			X
C Cvr 13.5″ AMER/ASIA Cobalt Blue Fabric	RPQ-00018	X
C Cvr 13.5″ French Canadian Cobalt Blue Fabric	RPQ-00019	X
C Cvr 13.5″ Japan Cobalt Blue Fabric	RPQ-00020	X
C Cvr 13.5″ Taiwan Cobalt Blue Fabric	RPQ-00023	X
C Cvr 13.5″ UK/Ireland Only Cobalt Blue Fabric	RPQ-00025	X
C Cvr 13.5″ Austria Germany Cobalt Blue Fabric	RPQ-00027	X
C Cvr 13.5″ France Cobalt Blue Fabric	RPQ-00028	X
C Cvr 13.5″ Switz/Lux Cobalt Blue Fabric	RPQ-00029	X
C Cvr 13.5″ AMER/ASIA Platinum Fabric	RPQ-00035	X				X			X
C Cvr 13.5″ French Canadian Platinum Fabric	RPQ-00036	X				X			X
C Cvr 13.5″ Mexico Platinum Fabric	3BZ-00001	X				X			X
C Cvr 13.5″ Japan Platinum Fabric	RPQ-00037	X				X			X
C Cvr 13.5″ Korea Platinum Fabric	RPQ-00038	X				X			X
C Cvr 13.5″ Thailand Platinum Fabric	RPQ-00039	X				X			X
C Cvr 13.5″ Taiwan Platinum Fabric	RPQ-00040	X				X			X
C Cvr 13.5″ BH/KW/OM/QA/SA/AE Platinum Fabric	RPQ-00041	X				X			X
C Cvr 13.5″ UK/Ireland Only Platinum Fabric	RPQ-00042	X				X			X
C Cvr 13.5″ Netherlands Poland Platinum Fabric	RPQ-00043	X				X			X
C Cvr 13.5″ Austria Germany Platinum Fabric	RPQ-00044	X				X			X
C Cvr 13.5″ France Platinum Fabric	RPQ-00045	X				X			X
C Cvr 13.5″ Switz/Lux Platinum Fabric	RPQ-00046	X				X			X
C Cvr 13.5″ Blgm Platinum Fabric	RPQ-00047	X				X			X
C Cvr 13.5″ Italy Platinum Fabric	RPQ-00048	X				X			X
C Cvr 13.5″ Portugal Platinum Fabric	RPQ-00049	X				X			X
C Cvr 13.5″ Spain Platinum Fabric	RPQ-00050	X				X			X
C Cvr 13.5″ DK/FI/NO/SE Platinum Fabric	RPQ-00051	X				X			X
C Cvr 13.5″ AMER/ASIA Sandstone	RPQ-00052		X				X			X
C Cvr 13.5″ French Canadian Sandstone	RPQ-00053		X				X			X
C Cvr 13.5″ Japan Sandstone	RPQ-00054		X				X			X
C Cvr 13.5″ Taiwan Sandstone	RPQ-00057		X				X			X
C Cvr 13.5″ UK/Ireland Only Sandstone	RPQ-00059		X				X			X
C Cvr 13.5″ Austria Germany Sandstone	RPQ-00061		X				X			X
C Cvr 13.5″ France Sandstone	RPQ-00062		X				X			X
C Cvr 13.5″ Switz/Lux Sandstone	RPQ-00063		X				X			X
C Cvr 15″ AMER/ASIA Black	RPR-00001			X	X			X			X
C Cvr 15″ French Canadian Black	RPR-00002			X	X			X			X
C Cvr 15″ Mexico Black	RPR-00037			X	X			X			X
C Cvr 15″ Japan Black	RPR-00003			X	X			X			X
C Cvr 15″ Korea Black	RPR-00004			X	X			X			X
C Cvr 15″ Thailand Black	RPR-00005			X	X			X			X
C Cvr 15″ Taiwan Black	RPR-00006			X	X			X			X
C Cvr 15″ BH/KW/OM/QA/SA/AE Black	RPR-00007			X	X			X			X
C Cvr 15″ UK/Ireland Only Black	RPR-00008			X	X			X			X
C Cvr 15″ Netherlands Poland Black	RPR-00009			X	X			X			X
C Cvr 15″ Austria Germany Black	RPR-00010			X	X			X			X
C Cvr 15″ France Black	RPR-00011			X	X			X			X
C Cvr 15″ Switz/Lux Black	RPR-00012			X	X			X			X
C Cvr 15″ Blgm Black	RPR-00013			X	X			X			X
C Cvr 15″ Italy Black	RPR-00014			X	X			X			X
C Cvr 15″ Portugal Black	RPR-00015			X	X			X			X
C Cvr 15″ Spain Black	RPR-00016			X	X			X			X
C Cvr 15″ DK/FI/NO/SE Black	RPR-00017			X	X			X			X
C Cvr 15″ AMER/ASIA Platinum	RPR-00018			X	X			X			X
C Cvr 15″ French Canadian Platinum	RPR-00019			X	X			X			X
C Cvr 15″ Mexico Platinum	RPR-00038			X	X			X			X
C Cvr 15″ Japan Platinum	RPR-00020			X	X			X			X
C Cvr 15″ Korea Platinum	RPR-00021			X	X			X			X
C Cvr 15″ Thailand Platinum	RPR-00022			X	X			X			X
C Cvr 15″ Taiwan Platinum	RPR-00023			X	X			X			X
C Cvr 15″ BH/KW/OM/QA/SA/AE Platinum	RPR-00024			X	X			X			X
C Cvr 15″ UK/Ireland Only Platinum	RPR-00025			X	X			X			X
C Cvr 15″ Netherlands Poland Platinum	RPR-00026			X	X			X			X
C Cvr 15″ Austria Germany Platinum	RPR-00027			X	X			X			X
C Cvr 15″ France Platinum	RPR-00028			X	X			X			X
C Cvr 15″ Switz/Lux Platinum	RPR-00029			X	X			X			X
C Cvr 15″ Blgm Platinum	RPR-00030			X	X			X			X
C Cvr 15″ Italy Platinum	RPR-00031			X	X			X			X
C Cvr 15″ Portugal Platinum	RPR-00032			X	X			X			X
C Cvr 15″ Spain Platinum	RPR-00033			X	X			X			X
C Cvr 15″ DK/FI/NO/SE Platinum	RPR-00034			X	X			X			X
C Cvr 13.5″ Japan Ice Blue Fabric	RPQ-00071					X			X
C Cvr 13.5″ UK/Ireland Only Ice Blue Fabric	RPQ-00072					X			X
C Cvr 13.5″ Switz/Lux Ice Blue Fabric	RPQ-00075					X			X
C Cvr 13.5″ Austria Germany Ice Blue Fabric	RPQ-00073					X			X
C Cvr 13.5″ France Ice Blue Fabric	RPQ-00074					X			X
C Cvr 13.5″ French Canadian Ice Blue Fabric	RPQ-00070					X			X
C Cvr 13.5″ AMER/ASIA Ice Blue Fabric	RPQ-00080					X			X
C Cvr 13.5″ Taiwan Ice Blue Fabric	RPQ-00076					X			X

Removable Solid-State Drive (rSSD)

Component	Part No.	1867	1868	1872	1873	1950	1951	1953	1958	1959	1979
rSSD Screw	CII-00001	X	X	X	X	X	X	X	X	X	X
rSSD 128GB	8LT-00006	X	X	X
rSSD 1TB	8LU-00005	X	X	X
rSSD 256GB	8LV-00009	X	X	X
rSSD 512GB	8LX-00009	X	X	X
rSSD 128GB	8LT-00005				X
rSSD 1TB	8LU-00004				X
rSSD 256GB	8LV-00008				X
rSSD 512GB	8LX-00008				X
rSSD 256GB	8LV-00003							X	X	X
rSSD 512GB	8LX-00003							X	X	X
rSSD 128GB	8LT-00002							X	X	X
rSSD 256GB	8LV-00002					X	X				X
rSSD 512GB	8LX-00002					X	X				X
rSSD 1TB	8LU-00002					X	X				X

AB-cover Display Assembly

Component	Part No.	1867	1868	1872	1873	1950	1951	1953	1958	1959	1979
A/B Cvr 13.5″ Black	RPN-00001		X				X			X
A/B Cvr 13.5″ Cobalt Blue	CIB-00005	X
A/B Cvr 13.5″ Platinum	CIB-00002	X				X			X
A/B Cvr 13.5″ Sandstone	CIB-00004		X				X			X
A/B Cvr 15″ Black	CIC-00001			X	X			X			X
A/B Cvr 15″ Platinum	CIC-00002			X	X			X			X
A/B Cvr 13.5″ Ice Blue	CIB-00003					X			X

Component Localization Codes

Code	Country	Code	Country
BH	Bahrain	FI	Finland
KW	Kuwait	NO	Norway
OM	Oman	SE	Sweden
QA	Qatar	Switz	Switzerland
SA	Saudi Arabia	Lux	Luxembourg
AE	United Arab Emirates	Blgm	Belgium
UK	United Kingdom	AMER	Canada, United States of America
DK	Denmark	ASIA	Australia, China, Hong Kong, Malaysia, New Zealand

IMPORTANT: Ensure that the devices meet all related safety and policy prior to repair. Follow the Safety Policies/Procedures described in this guide when applicable in lieu of continuing repair.

The following approach should be taken when troubleshooting your MICROSOFT SURFACE LAPTOP 4 1959:

1. Update device to latest OS/FW versions using the SDT tool.

IMPORTANT: Device updates are required as a prerequisite to all hardware repairs.

2. Verify any suspected hardware failures by setting the device in a known OS/FW version state and running SDT to verify fault:

a. Replace the device’s internal rSSD with a BMR imaged rSSD containing latest OS and FW updates (not supplied – must be created as a fault verification jig/tool).

b. Run SDT and verify if condition persists or if resolved with use of BMR imaged drive.

i. If problem is resolved, then re-image original rSSD or replace original rSSD and image.

ii. If problem persists then replace suspected hardware FRU related to the problem by following the detailed replacement procedures covered within this service manual.

3. SDT must be run following all hardware repairs where a FRU was replaced to further verify that problem was resolved by the repair action taken.

WARNING: Please note that the battery bears the following warning label. Please heed the information provided on the label.

Battery cannot be easily replaced by user

Risk of fire or burning – contact Microsoft for assistance

Do not separate or remove battery from backplate cover

Do not modify battery, its wiring, or connectors

Do not replace, short circuit, bend, crush, or puncture battery

Do not dispose of battery in fire or expose to high temperatures (+140°F/60°C)

Preliminary Requirements

IMPORTANT: Be sure to follow all special (bolded) notes of caution within each process section.

Required Tools and Components:

Tools:

Plastic tweezers / spudger

Isopropyl Alcohol Dispenser Bottle (use only 70% IPA)

Cleaning swabs

Clamps (2), 2″ Irwin spring or 4.5″ Fastpro

Plastic feeler gauge – 0.050mm

Components:

Feet (Refer to Illustrated Service Parts List)

Prerequisite Steps:

Power off device – Ensure device is powered off and disconnected from a power supply.

General Safety – Check to make sure that general guidelines and ESD compliance steps are followed prior to opening the device.

Position device – To prevent scratches, flip device over onto a clean surface free of debris with the device bottom facing up for access to the feet for removal.

IMPORTANT: There are two types of feet (front and back).

Procedure – Removal (Non-Skid Foot Pad)

1. Front foot removal – To remove front feet, insert the pointed end of a plastic Spudger tool from the long side of the device under the foot. There is a designed gap in the foot located at the center of the outside edge of the foot. Point the plastic tool directly in the middle of the foot starting from the front edge and push in towards the middle of the device. Removal works best if the spudger is at a relatively low angle relative to the tabletop. Use plastic tweezers / spudger to lift one edge of each foot. Grasp the loose end and pull the foot from the D-bucket.

2. Rear foot removal – To remove back feet, perform the same steps as for the front feet but from the back side of the device and along the long edge. Removal works best if the spudger is at a relatively low angle relative to the tabletop.

3. Adhesive removal – Remove any adhesive liners in the foot pockets. Use IPA and cotton wipes to clean off any adhesive residue within the foot pocket. Inspect the foot area carefully for any adhesive liner that may have remained. The liner is clear and may be hard to see at first glance. Inspect closely.

IMPORTANT: Ensure the IPA is completely dried off device and that no adhesive residue is left before applying new feet to avoid the risk of insufficient adhesion of the new feet.

Procedure – Installation (Non-Skid Feet)

IMPORTANT: Any further repairs that are required on the device should be carried out prior to feet installation. Do not reuse feet previously removed from a device.

1. Prepare new front feet and press into place – To reassemble front foot, remove protective sheet to expose adhesive on foot. Align the 3 posts with their respective pockets on the bottom side of the unit and hand press the foot in until the foot sits flat. Complete previous steps for the other front foot.

2. Clamp replaced feet – Align and center the press head of the clamp onto the front feet. Clamp both front feet for 4 minutes.

3. Inspect for anomalies – Inspect feet to ensure no cosmetic damage or gaps between the feet and the D-bucket exist. If a gap exists, use a feeler gauge to verify the gap is smaller than 0.05 mm. If the gap is larger, replace the foot.

4. Prepare new back feet and press into place – To reassemble the back feet, remove protective sheet to expose adhesive on foot. Insert the foot into the pocket on the bottom side of the unit and hand press the foot in until the foot sits flat.

5. Clamp replaced feet – Align and center the press head of the clamp onto the rear feet. Clamp both rear feet for 4 minutes.

6. Inspect for anomalies – Inspect feet to ensure no cosmetic damage or gaps between the feet and the D-bucket exist. If a gap exists, use a feeler gauge to verify the gap is smaller than 0.05 mm. If the gap is larger, replace the foot.

7. Run SDT – Run SDT to ensure all device features and functions operate as expected.

IMPORTANT: Before transporting the device, we recommend letting it sit feet-down on a tabletop for at least 12 hours. If this isn’t possible, it’s recommended to avoid placing the device in a backpack, purse, other types of carriers, until at least 12 hours after installing new feet.

IMPORTANT: Any further repairs that are required on the device should be carried out prior to feet installation. Do not reuse feet previously removed from a device.

1. Prepare new front feet and press into place – To reassemble front foot, remove protective sheet to expose adhesive on foot. Align the 3 posts with their respective pockets on the bottom side of the unit and hand press the foot in until the foot sits flat. Complete previous steps for the other front foot.

2. Pinch replaced feet – Placing the keyboard and foot between your thumb and index finger as shown, pinch the foot tightly with your thumb and hold for 20 seconds.

3. Inspect for anomalies – Inspect feet after pinching to ensure no cosmetic damage or gaps between the foot and the chassis exist. If a gap exists, use a feeler gauge to verify gap is smaller than 0.05 mm. If gap is larger, replace foot.

4. Prepare new back feet and press into place – To reassemble the back feet, remove protective sheet to expose adhesive on foot. Insert the foot into the pocket on the bottom side of the unit and hand press the foot in until the foot sits flat.

5. Pinch replaced feet – Placing the keyboard and foot between your thumb and index finger as shown, pinch the foot tightly with your thumb and hold for 20 seconds.

6. Inspect for anomalies – Inspect feet to ensure no cosmetic damage or gaps between the feet and the D-bucket exist. If a gap exists, use a feeler gauge to verify gap is smaller than 0.05 mm. If gap is larger, replace foot.

7. Run SDT – Run SDT to ensure all device features and functions operate as expected.

IMPORTANT: Before transporting the device, we recommend letting it sit feet-down on a tabletop for at least 12 hours. If this isn’t possible, it’s recommended to avoid placing the device in a backpack, purse, other types of carriers, until at least 12 hours after installing new feet.

IMPORTANT: Devices are built with either a fabric type or metal type C-cover keyboard assembly. The C-cover removal process differs between them. Be sure to follow the proper procedure based on the device model and associated C-cover type.

Required Tools and Components:

Tools:

Software Tool – SDT

Isopropyl Alcohol Dispenser (use only 70% IPA)

5IP (Torx plus) driver

Anti-static wrist strap (1M Ohm resistance)

Recommended: ESD-safe battery cover (13.5″ or 15″)

Components:

C-cover (If replacing refer to Illustrated Service Parts List)

(New 5IP screw quantity= 4 supplied with component)

Prerequisite Steps:

Power off device, ensure it’s disconnected from a power supply.

Follow general safety and ESD compliance steps.

Remove non-skid feet.

IMPORTANT: Be sure that all foot adhesive remains have been removed from the bottom device case foot sockets prior to C-cover screw removal to avoid the risk of stripping out the C-cover screw(s).

Procedure – Removal (C-cover Keyboard Metal Type)

1. Remove C-cover screws – Using a 5IP (Torx plus) driver, uninstall 1 screw from each foot socket (4 total).

CAUTION: Take care to prevent from depressing the keyboard power button during this step. If power button is accidentally depressed and device turns on, shut down device as normal through OS Start menu.

CAUTION: Prior to unscrewing, ensure the driver is seated correctly in the screw recess by lightly turning the driver clockwise until it can be felt engaging fully with the screw. Also be sure the driver remains perpendicular to the device surface as much as possible during removal. Otherwise, there is a risk of stripping the screw heads.

CAUTION: Ensure all (4) screws are removed from the enclosure before starting C-cover removal, otherwise there is a high risk of irreversibly damaging the C-cover.

2. Separate C-cover from device – Turn device over into standard use position and open the AB-cover display exposing the C-cover keyboard. The C-cover is secured by magnets in addition to the screws. Grab the C-cover edge closest to display and slowly remove the C-cover at an angle.

CAUTION: Do not pull the C-cover apart beyond 45 degrees otherwise damage to C-cover FPC could occur. Never rest the rear edge of the C-cover on the device at the display hinge point or allow it to impact or touch the display.

3. Position C-cover for FPC removal – After lifting the C-cover completely from the magnets on the device, angle and hover the C-cover so that the antenna side is facing down towards the device and the C-cover FPC is accessible.

4. Disconnect FPCs – While hovering the C-cover, disconnect the FPC from the main board. The FPC is easily disconnected by pulling up on the metal head vertically with a fingernail or Spudger tool edge.

CAUTION: When removed, place the C-cover in a safe place with key and trackpad side down and FPC facing up to avoid bending/creasing the FPC. Protect the cosmetic side from damage.

WARNING: It is recommended a Microsoft provided ESD-safe battery cover is placed across the device to protect the battery from accidental damage during repair.

IMPORTANT: Remove rSSD whenever C-cover is removed from device. This disconnects the battery from all logical components for safety.

Procedure – Installation (C-cover Keyboard Metal Type)

1. Pre-installation Device Inspection – Verify the battery’s condition. Verify the condition of the LDI (Liquid Damage Indicator) inside the audio jack. Any color other than white indicates liquids have entered the device.

2. Check for unexpected items – Check C-cover and device enclosure for any loose articles. Check and remove any foreign objects that magnets may have attracted. Carefully inspect the area around the battery for any foreign objects before removing the battery cover.

3. Install rSSD – Follow the rSSD installation procedure.

4. Remove tape from new C cover FPC – Remove the shipping tape from the new C-cover FPC.

5. Connect C-cover FPC – Remove the battery cover. Hover the C-cover over the device and connect the C-cover FPC to the main board by pressing the connection with your finger.

CAUTION: Be sure that the FPC bends fall in place properly as pre-bent and no folds or creases are created during re-assembly.

6. Align the C-cover – Properly align the cover using the front edge alignment posts. Carefully place the C-cover back onto the unit and shift until it snaps into place.

CAUTION: Ensure that the C-cover is correctly aligned and seated before closing the device to avoid risk of breaking the display.

7. Install C-cover Screws – Close the AB-cover. Turn the unit over and use a 5IP screwdriver to install 4 new screws. Screws should be installed until just snug and seated, and then turned another 45 degrees (1/8 turn) or until fully fastened.

8. Run SDT – Run SDT to ensure all device features and functions operate as expected.

9. Install Feet – If SDT tests pass, follow steps for installing the non-skid feet.

IMPORTANT: Devices are built with either a fabric type or metal type C-cover keyboard assembly. The C-cover removal process differs between them. Be sure to follow the proper procedure based on the device model and associated C-cover type.

Required Tools and Components:

Tools:

Software Tool – SDT

Isopropyl Alcohol Dispenser (use only 70% IPA)

5IP (Torx plus) driver

Heavy duty suction cups

Anti-static wrist strap (1M Ohm resistance)

Recommended: ESD-safe battery cover (13.5″ or 15″)

Components:

C-cover (If replacing refer to Illustrated Service Parts List)

(New 5IP screw quantity=4 supplied with component)

Prerequisite Steps:

Power off device, ensure it’s disconnected from a power supply.

Follow general safety and ESD compliance steps.

Remove non-skid feet.

IMPORTANT: Be sure that all foot adhesive remains have been removed from the bottom device case foot sockets prior to C-cover screw removal to avoid the risk of stripping out the C-cover screw(s).

Procedure – Removal (C-cover Keyboard Fabric Type)

1. Remove C-cover screws – Using a 5IP (Torx plus) driver, uninstall 1 screw from each foot socket (4 total).

CAUTION: Fabric C-covers utilize magnets and a hook latching onto the chassis, whereas metal C-covers do not.

2. Apply suction cups – Turn device over into standard use position and open the AB-cover display. Place a suction cup in the bottom palm rest area, as close to the edge as possible.

CAUTION: Do not place suction cup on Trackpad. Do not wet the suction cup. Place a thumb holding down the corner hinge side of the cover. Keep pressure on the hinge area to prevent the back edge of the cover from lifting while pulling up on the suction cup. If the suction cup releases, re-attach and try again.

3. Separate C-cover from device – Once C-cover separation is achieved, place a finger between the C-cover and device. Pull upwards slightly to separate the C-cover from the magnets.

4. Angle C-cover – Angle the C-cover at approximately 45 degrees from horizontal. Do not exceed 45 degrees to avoid risk of damaging the C-cover hook or FPC.

5. C-cover hook clearance – Once angled, maintain the angle while pulling the C-cover directly towards yourself. Avoid pressing the power button.

6. Disconnect FPCs – While hovering the C-cover, disconnect the FPC from the main board by pulling up on the metal head vertically.

IMPORTANT: Remove rSSD whenever C-cover is removed from device. This disconnects the battery from all logical components for safety.

Procedure – Installation (C-cover Keyboard Fabric Type)

1. Pre-installation Device Inspection – Verify the battery’s condition. Verify the condition of the LDI (Liquid Damage Indicator) inside the audio jack.

2. Check for unexpected items – Check C-cover and device enclosure for any loose articles. Check and remove any foreign objects that magnets may have attracted.

3. Install rSSD – Follow the rSSD installation procedure.

4. Remove tape from new C-cover FPC – Remove the shipping tape.

5. Connect C-cover FPC – Remove battery cover. Hover the C-cover over the device and connect the C-cover FPC to the main board.

6. Align the C-cover – Properly align the cover using the front edge alignment posts. Place the C-cover back onto the unit and shift until it snaps into place. The top C-cover area under the display will protrude slightly. Press firmly on the top area until you hear a click and the C-cover flattens out.

CAUTION: Ensure that the C-cover is correctly aligned and seated before closing the device lid.

7. Install C-cover Screws – Close the AB-cover. Turn the unit over and use a 5IP screwdriver to install 4 new screws. Tighten until just snug, then turn another 45 degrees (1/8 turn) or until fully fastened.

8. Run SDT – Run SDT to ensure all device features and functions operate as expected.

9. Install Feet – If SDT tests pass, follow steps for installing the non-skid feet.

Required Tools and Components:

Tools:

Software Tool – SDT

Isopropyl Alcohol Dispenser (use only 70% IPA)

5IP (Torx plus) driver

Anti-static wrist strap (1M Ohm resistance)

Recommended: ESD-safe battery cover (13.5″ or 15″)

Components:

rSSD (If replacing refer to Illustrated Service Parts List)

(New 5IP screw supplied with component)

Prerequisite Steps:

Power off the device and disconnect from power.

Follow general safety and ESD compliance steps.

Remove non-skid feet.

Remove C-cover.

Procedure – Removal (rSSD)

1. Remove rSSD Screw – Use a 5IP (Torx-Plus) driver to remove the screw securing the rSSD.

WARNING: Be very careful to position your screwdriver directly over the rSSD screw and to avoid slipping towards the battery during removal. If the battery is contacted, impacted, or damaged in any way, activities should immediately cease.

2. Remove rSSD – The rSSD should lift upwards to a ~15 degree tilt after the screw is removed. Carefully grab the sides of the rSSD case and pull it out of the main board socket at the same ~15 degree angle.

IMPORTANT: Confirm the condition of the thermal pillow that resides beneath the rSSD. It should maintain good contact and not show physical evidence of deterioration such as collapsing or excessive cracking. The outside mylar layer of the foam should be intact.

Procedure – Installation (rSSD)

IMPORTANT: Only a Microsoft rSSD with the part number as specified in the parts list, per device model, and of like capacity should be replaced in the device.

1. Insert rSSD – Insert the connector end of the rSSD into the SSD connector on the Mainboard at a ~15 degree angle.

2. Install new rSSD screw – Use a 5IP screwdriver to install a new rSSD screw until it is just snug and seated, and then turn it another 45 degrees (1/8 turn) or until fully fastened.

3. Install C-cover – Follow the steps for C-cover Keyboard Assembly Replacement.

4. Imaging new rSSD – Power on the device. Apply a new image to the rSSD using a BMR Imaging key specific to the device model.

5. Run SDT – Run SDT to ensure all device features and functions operate as expected. If tests pass, continue with final assembly.

6. Install Feet – Follow the procedure for installing non-skid feet.

WARNING: The AB-cover is extremely sensitive to ESD and should be managed accordingly. Be sure all ESD safety precautions are taken. Store the AB-cover assembly in an ESD bag.

IMPORTANT: The device must first be set in AB-cover Replacement Mode before the broken/defective AB-cover is removed. Software tools are provided for this purpose. If the AB-cover is non-functional, connect an external PC monitor to the device’s Mini-DP port.

Prerequisite Steps:

1. Put device in AB-cover Replacement Mode: Connect a USB drive with software tools, connect power, and power on the device. From the OS, run STEP1_DisplayModuleReplacement.cmd and accept the power down prompt.

2. Perform General Safety and ESD compliance steps.

3. Remove feet.

4. Remove C-cover.

5. Remove rSSD.

Removal Process (AB-cover Display Assembly)

1. Disconnect Antenna Cable – Using angled tweezers, disassemble the left antenna cable located to the left of the left AB-cover FPC RF shield.

2. Remove FPC RF Baffles – Using tweezers, remove the left and right baffles that sit on top of the RF shield cans by prying upwards.

3. Remove FPC RF Shield Cans – Using tweezers, remove the two shield lids. For both shields, peel up the shield along its front edge and bend it at 45 degrees. Carefully pull vertically and twist left and right to remove the shield.

4. Disconnect FPCs – Once shields are removed, use a Spudger tool to disconnect the 4 FPCs by prying upwards on the corners first and then along the front edge. Gently pull each FPC ribbon towards the front of the device to untuck it.

5. Remove Two Inner Hinge Screws – Using a 6IP screwdriver, remove the inner 2 screws on the left and right hinges.

6. Set Display Angle to 90 deg – Place the display module at about 90 degrees. Remove the remaining external screw at the left and right hinges while holding the display.

7. Remove AB-cover – Lift the display module straight up vertically until detached.

Procedure installation – (Metal C-cover Device)

1. Initial AB-cover Install – Clean out any residual thread locker from hinge screw holes. Set the new AB-cover in place and install 2 new outer screws on each hinge (4 total). Install screws until just snug, then turn another 90 degrees (1/4 turn) or until fully fastened.

2. Release Hinge Clamp Force – Turn all 4 screws 90 degrees (1/4 turn) counterclockwise to release the clamp force for later alignment.

3. Connect AB-cover FPCs – Connect all 4 display module FPCs into their connectors.

4. Tuck FPCs – Using a guitar pick, carefully tuck the loose portion of the FPCs under the enclosure lip. Ensure the FPC is taut with no slack protruding.

5. Touch Calibration Steps:

a. Install rSSD to enable device operation.

b. Temporarily connect the C-cover FPC and set the C-cover in place (no screws needed).

c. Connect the software tools USB drive.

d. Connect the power supply.

e. Power on the device.

f. Run software tool: In the OS, navigate to the USB drive and run STEP2_DisplayModuleReplacement.cmd. Follow prompts; the device will restart. Verify touch is working.

g. Power off the device.

h. Remove C-cover.

i. Remove rSSD.

6. FPC RF Shield Installation – Install 2 new shield lids above the 4 AB-cover FPC connectors. Ensure the correct shield type is used for each side. Visually inspect shields for bent fingers. Push shields vertically downwards onto the fences to snap them into place.

7. Connect WiFi Antenna – Reconnect the left WiFi antenna cable.

8. RF Baffle Installation – Install 2 new RF baffles on top of the shield. Peel off the adhesive protector and snap them into place. Firmly press along the top of the RF Baffle wall to adhere it.

9. AB-cover Hinge Alignment:

a. Set Display Module to 90 degrees. Shift the innermost screw on each side so that the screws are concentric with the circular feature on the hinge.

b. Verify alignment by inserting a plastic 0.40mm feeler gauge between the display and chassis. It should slide smoothly.

c. Secure hinge by turning all 6 hinge screws another 90 degrees (1/4 turn) or until fully fastened.

10. Opening Strength Adjustment (Metal C-cover):

a. Remove mylars covering the closure steels on the C-cover using tweezers.

b. Remove the closure steels from the front edge of the C-cover.

c. Clean the closure steel area with a cotton swab and IPA.

d. Install new closure steels about 2mm from the outside edge of the C-cover.

e. Place one closure steel into the left enclosure pocket about 2mm from the outside left edge.

f. Secure it by pressing continuously along its surface with the back of the tweezers for 80 seconds.

g. Place mylar tape over the steel, fully covering it and overlapping onto the C-cover.

h. Smooth the tape with a Spudger tool.

i. Repeat steps e-h for the right side.

11. Fit C-cover – Follow C-cover reassembly instructions, but do not install feet screws yet.

12. Check AB-cover alignment – Close the device and check the flushness across the entire front edge. If not flush, remove hinge screws and repeat step 9 until it is flush.

13. rSSD Install – Follow the rSSD installation procedure.

14. C-cover Install – Follow the metal C-cover installation procedure.

15. Run SDT – Power on and run the SDT tool to validate full functionality.

16. Install Feet – If SDT passes, install the non-skid feet.

WARNING: The AB-cover is extremely sensitive to ESD and should be managed accordingly. Be sure all ESD safety precautions are taken. Store the AB-cover assembly in an ESD bag.

IMPORTANT: The device must first be set in AB-cover Replacement Mode before the broken/defective AB-cover is removed. Software tools are provided for this purpose. If the AB-cover is non-functional, connect an external PC monitor to the device’s Mini-DP port.

Prerequisite Steps:

1. Put device in AB-cover Replacement Mode: Connect a USB drive with software tools, connect power, and power on the device. From the OS, run STEP1_DisplayModuleReplacement.cmd and accept the power down prompt.

2. Perform General Safety and ESD compliance steps.

3. Remove feet.

4. Remove C-cover.

5. Remove rSSD.

Removal Process (AB-cover Display Assembly)

1. Disconnect Antenna Cable – Using angled tweezers, disassemble the left antenna cable located to the left of the left AB-cover FPC RF shield.

2. Remove FPC RF Baffles – Using tweezers, remove the left and right baffles that sit on top of the RF shield cans by prying upwards.

3. Remove FPC RF Shield Cans – Using tweezers, remove the two shield lids. For both shields, peel up the shield along its front edge and bend it at 45 degrees. Carefully pull vertically and twist left and right to remove the shield.

4. Disconnect FPCs – Once shields are removed, use a Spudger tool to disconnect the 4 FPCs by prying upwards on the corners first and then along the front edge. Gently pull each FPC ribbon towards the front of the device to untuck it.

5. Remove Two Inner Hinge Screws – Using a 6IP screwdriver, remove the inner 2 screws on the left and right hinges.

6. Set Display Angle to 90 deg – Place the display module at about 90 degrees. Remove the remaining external screw at the left and right hinges while holding the display.

7. Remove AB-cover – Lift the display module straight up vertically until detached.

Procedure installation – (Fabric C-cover Device)

1. Initial AB-cover Install – Clean out any residual thread locker from hinge screw holes. Set the new AB-cover in place and install 2 new outer screws on each hinge (4 total). Install screws until just snug, then turn another 90 degrees (1/4 turn) or until fully fastened.

2. Release Hinge Clamp Force – Turn all 4 screws 90 degrees (1/4 turn) counterclockwise to release the clamp force for later alignment.

3. Connect AB-cover FPCs – Connect all 4 display module FPCs into their connectors.

4. Tuck FPCs – Using a guitar pick, carefully tuck the loose portion of the FPCs under the enclosure lip. Ensure the FPC is taut with no slack protruding.

5. Touch Calibration Steps:

a. Install rSSD to enable device operation.

b. Temporarily connect the C-cover FPC and set the C-cover in place (no screws needed).

c. Connect the software tools USB drive.

d. Connect the power supply.

e. Power on the device.

f. Run software tool: In the OS, navigate to the USB drive and run STEP2_DisplayModuleReplacement.cmd. Follow prompts; the device will restart. Verify touch is working.

g. Power off the device.

h. Remove C-cover.

i. Remove rSSD.

6. FPC RF Shield Installation – Install 2 new shield lids above the 4 AB-cover FPC connectors. Ensure the correct shield type is used for each side. Visually inspect shields for bent fingers. Push shields vertically downwards onto the fences to snap them into place.

7. Connect WiFi Antenna – Reconnect the left WiFi antenna cable.

8. RF Baffle Installation – Install 2 new RF baffles on top of the shield. Peel off the adhesive protector and snap them into place. Firmly press along the top of the RF Baffle wall to adhere it.

9. AB-cover Hinge Alignment:

a. Set Display Module to 90 degrees. Shift the innermost screw on each side so that the screws are concentric with the circular feature on the hinge.

b. Verify alignment by inserting a plastic 0.40mm feeler gauge between the display and chassis. It should slide smoothly.

c. Secure hinge by turning all 6 hinge screws another 90 degrees (1/4 turn) or until fully fastened.

10. Fit C-cover – Follow C-cover reassembly instructions, but do not install feet screws yet.

11. Check AB-cover alignment – Close the device and check the flushness of the display module cover across the rear corners of each hinge. If not flush, remove hinge screws and repeat step 9 until it is flush.

12. rSSD Install – Follow the rSSD installation procedure.

13. C-cover Install – Follow the fabric C-cover installation procedure.

14. Run SDT – Power on and run the SDT tool to validate full functionality.

15. Install Feet – If SDT tests pass, install the non-skid feet.

A calibration routine is required for a replaced AB-cover Display Assembly. The tool runs from a USB drive within the Windows OS.

USB Drive Setup

Copy the tools to the root directory of a USB drive. The following files are required in the same directory:

Folder: Project

File: STEP1_DisplayModuleReplacement.cmd

File: STEP2_DisplayModuleReplacement.cmd

Tool Runtime Details

The calibration tool runs within the Windows OS, so the device must be functional to that point. The tools perform two functions: setting the device into AB-cover replacement mode and performing touch calibration on the new AB-cover.

Running STEP1_DisplayModuleReplacement.cmd (Before replacing the display)

1. The tool will show “Invoking UAC for Privilege Escalation”.

2. It will then report “stdout: Successfully entered into Servicing Mode”.

3. You will be prompted “Shutdown now? (Y/N):”. Enter ‘y’ and press Enter.

4. The tool confirms with a “Shutdown” message and a countdown, “Power Off in 10 seconds…”.

5. A Windows OS alert “You’re about to be signed out” will appear. The device will shut down, enabling you to proceed with the physical display replacement.

Running STEP2_DisplayModuleReplacement.cmd (After installing the new display)

1. The tool will show “Privilege Escalation”.

2. It will initiate preliminary device testing, showing messages like “Begin sanity tests”, “Project Laptop… found”, “Sanity tests passed successfully”, and “Begin shorts test”.

3. A prompt will appear: “Calibration about to begin: DO NOT TOUCH THE SCREEN OR USE PEN – DO NOT PLUG IN POWER”, with a countdown.

4. The tool reports progress with messages like “Shorts test passed successfully”, “Beginning calibration”, “Calibration completed successfully”, “Begin validating maps”, “Maps verification completed successfully”, and “TDM replaced successfully”.

5. Once finished, it will show “Rebooting in 10 seconds…” and “stdout: Successfully exited Servicing Mode”.

6. A Windows OS alert “You’re about to be signed out” will appear, and the device will restart.

If the calibration fails, the tool will display an error message: “ERROR, Calibration verification failed. Please follow the retry flow…”.

If touch calibration fails, it is necessary to take the following steps to retry the calibration process.

Preparation for Retry:

1. Install the rSSD to enable device operation.

2. Temporarily connect the C-cover FPC and set the C-cover in place on the chassis (no screws needed).

3. Connect the software tools USB drive.

4. Connect the power supply.

5. Power on the device using the C-cover power button.

6. Run the software tool `STEP1_DisplayModuleReplacement.cmd` from the USB drive. Accept the power down prompt when the tool completes.

Retry Steps:

1. Ensure the device is powered off and disconnected from the power supply.

2. Remove the C-cover that was temporarily installed.

3. Place an ESD-safe battery cover across the device to protect the battery.

4. Remove the rSSD to ensure all power is removed from the device.

5. Remove the new AB-cover that failed calibration and install another new AB-cover. The device must see a new AB-cover to accept new touch calibration data.

IMPORTANT: This step must be carried out to re-enable touch calibration.

Second Calibration Attempt:

1. Confirm the following preparation steps have been completed again:

a. Install rSSD.

b. Temporarily connect the C-cover FPC and set the C-cover in place.

c. Connect software tools USB drive.

d. Connect power supply.

e. Power on the device.

f. Run the software tool `STEP2_DisplayModuleReplacement.cmd`. Follow prompts; the device will restart. Verify touch by running your finger across the screen.

2. Navigate to the USB key with software tools using Windows Explorer and run the SDT tool.

3. Within the SDT tool, choose Select Tests, Touch Display Repair, and initiate by clicking on Run Selected button. Follow the instructions provided by the tool.

IMPORTANT: If the calibration tool continues to return an error message that indicates calibration failure, the device should be processed as an exchange.