MICROSOFT SURFACE LAPTOP 3 1867 (01) PDF Document

The following are the various Surface Laptop 3 and 4 models covered in the service guide:

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)

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 on the bottom center closest to the display hinge point.

The following terms are used throughout the service manual for the MICROSOFT SURFACE LAPTOP 3 1867:

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.

Microsoft Recommended Service Jigs:

ESD-safe battery cover

Microsoft Provided Software Tools / References:

Software Tool – AB-cover Touch Calibration tool

How To: Update Surface device firmware and OS

How To: Surface Tools Video

Download: Surface drivers and firmware

Download: Surface Diagnostic Toolkit (SDT)

Download: Surface Data Eraser

Download: 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 3 1867:

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 the repair activities described in this Guide. The repair activities identified in this Guide should only be undertaken by technically inclined individuals with the knowledge, experience, and specialized tools required to repair Microsoft devices.

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.

Before beginning any repair on your MICROSOFT SURFACE LAPTOP 3 1867, follow these specific precautions:

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.

Review the General Safety Precautions and Battery Safety Sections of this Guide before beginning work.

The MICROSOFT SURFACE LAPTOP 3 1867 contains a built-in, lithium-ion rechargeable battery. Battery safety is a significant concern when repairing a device. Follow these best practices:

For optimum compatibility, performance, and product safety, use genuine Microsoft replacement parts. Use of non-Microsoft, incompatible, reused, or modified batteries could cause battery overheating, expansion, venting, leaking, or a thermal event.

Before beginning repair, ensure your workspace is free of flammable debris, has adequate ventilation, and you have a fire suppressant device (e.g., fire blanket, sand, Class B fire extinguisher) within easy reach or within 20 feet of a fireproof enclosure.

Use personal protective equipment (PPE) when handling damaged, venting, or hot battery packs.

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 it.

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 needs to be stored temporarily:

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

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

Reinspect the battery pack as outlined in the guide prior to restarting repair.

Upon opening your MICROSOFT SURFACE LAPTOP 3 1867, visually inspect the battery for signs of damage. Factors to consider 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 these signs 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 them 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 inside a battery cell, resulting in heating, smoke, and sometimes fire. Act immediately if you see any of the following symptoms:

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

The battery pouch suddenly expands in size.

A popping or hissing noise from the battery or device.

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 it 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 any Microsoft device visually exhibits any of the following symptoms, cease all further repair efforts and contact Microsoft Surface Customer Support:

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 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.

(1) Non-Skid Feet

(2) C-cover Keyboard Assembly (Metal or Fabric)

(3) Removable Solid-State Drive (rSSD)

(4) AB-cover Display Assembly

Component Localization Codes

The following approach should be taken when troubleshooting hardware issues on your MICROSOFT SURFACE LAPTOP 3 1867:

IMPORTANT: Ensure that the devices meet all related safety and policy prior to repair. Follow the Safety Policies/Procedures described on page 7 when applicable in lieu of continuing repair.

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.

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.

Follow these steps to replace the non-skid foot pads. Note there are two types of feet (front and back).

Prerequisite Steps:

Power off device and ensure it is disconnected from a power supply.

Follow general safety and ESD compliance steps.

To prevent scratches, flip device over onto a clean surface free of debris with the device bottom facing up.

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. Point the 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. 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.

3. Adhesive removal – Remove any adhesive liners in the foot pockets. Use IPA and cotton wipes to clean off any adhesive residue. Inspect the foot area carefully for any remaining liner, which may be clear and hard to see. Ensure the IPA is completely dried and no residue is left before applying new feet.

Procedure – Installation (Non-Skid Feet)

IMPORTANT: Any further repairs should be carried out prior to feet installation. Do not reuse feet previously removed.

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

2. Clamp replaced feet – Align and center the press head of a 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. If a gap exists, use a feeler gauge to verify the gap is smaller than 0.05 mm. If larger, replace the foot.

4. Prepare new back feet – To reassemble the back feet, remove the protective sheet to expose adhesive. Insert the foot into the pocket on the bottom side of the unit and hand press it in until it 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 for cosmetic damage or gaps. If a gap exists, verify it is smaller than 0.05 mm with a feeler gauge. If larger, replace the foot.

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

IMPORTANT: Before transporting the device, let it sit feet-down on a tabletop for at least 12 hours to allow the adhesive to set.

Alternate Procedure – Installation (Non-Skid Feet)

1. Prepare new front feet – As above, remove protective sheet, align the 3 posts, and press into place.

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

3. Inspect for anomalies – Check for gaps or damage. Use a feeler gauge for gaps larger than 0.05 mm.

4. Prepare new back feet – As above, remove protective sheet and press into place.

5. Pinch replaced feet – Pinch the rear foot between your thumb and index finger tightly for 20 seconds.

6. Inspect for anomalies – Check for gaps or damage.

7. Run SDT and let the device sit for 12 hours before transport.

Prerequisite Steps:

Power off the device and disconnect from power.

Follow general safety and ESD compliance steps.

Follow steps for Non-Skid Feet removal. Ensure all foot adhesive is removed from the foot sockets to avoid stripping C-cover screws.

Procedure – Removal (Metal Type)

1. Remove C-cover screws – Using a 5IP (Torx plus) driver, uninstall 1 screw from each of the four foot sockets.

CAUTION: Avoid depressing the power button. Ensure the driver is seated correctly before unscrewing. Ensure all 4 screws are removed before attempting C-cover removal.

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

CAUTION: Do not pull the C-cover apart beyond 45 degrees to avoid damaging the C-cover FPC.

3. Position C-cover for FPC removal – After lifting the C-cover from the magnets, angle and hover it so the antenna side faces down towards the device, making the FPC accessible.

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

CAUTION: Place the removed C-cover in a safe place with the key/trackpad side down and FPC facing up to avoid damage. It’s recommended to place an ESD-safe battery cover over the device’s battery to protect it during repair.

IMPORTANT: Remove the rSSD whenever the C-cover is removed from the device for safety purposes.

Procedure – Installation (Metal Type)

1. Pre-installation Device Inspection – Verify the battery’s condition and check the Liquid Damage Indicator (LDI) inside the audio jack. If the LDI is any color other than white, the device has liquid damage.

2. Check for unexpected items – Inspect the C-cover (both sides) and device enclosure for any loose articles or foreign objects, especially around the magnets and battery.

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’s FPC.

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

CAUTION: Ensure the FPC bends fall into place properly without creating new folds or creases.

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 the C-cover is correctly aligned before closing the display to avoid breaking it.

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

8. Run SDT – Run the Surface Diagnostic Toolkit to ensure all features and functions operate as expected.

9. Install Feet – If SDT tests pass, follow the steps for installing the Non-Skid Feet.

Prerequisite Steps:

Power off the device and disconnect from power.

Follow general safety and ESD compliance steps.

Follow steps for Non-Skid Feet removal. Ensure all foot adhesive is removed to avoid stripping C-cover screws.

Procedure – Removal (Fabric Type)

1. Remove C-cover screws – Using a 5IP (Torx plus) driver, uninstall 1 screw from each of the four foot sockets.

CAUTION: Fabric C-covers use magnets and a hook latch, unlike metal C-covers. Ensure all 4 screws are removed before proceeding.

2. Apply suction cups – Turn the device over and open the display. Place a suction cup in the bottom palm rest area, close to the edge. Do not place it on the trackpad. Do not wet the suction cup.

CAUTION: Place your thumb on the corner hinge side of the cover to hold it down. Pull up on the suction cup, being careful to prevent the back edge from lifting. If the suction cup releases, re-attach and try again.

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

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

5. C-cover hook clearance – While maintaining the angle, pull the C-cover directly towards yourself to clear the hook. 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 the rSSD whenever the C-cover is removed from the device.

Procedure – Installation (Fabric Type)

1. Pre-installation Device Inspection – Verify battery condition and check the Liquid Damage Indicator (LDI).

2. Check for unexpected items – Inspect the C-cover and device enclosure for any loose articles.

3. Install rSSD – Follow the rSSD installation procedure.

4. Remove 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 FPC to the main board.

6. Align the C-cover – 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 area under the display will protrude slightly; press firmly on this area until you hear a click and the cover flattens.

CAUTION: Ensure the C-cover is correctly aligned before closing the lid.

7. Install C-cover Screws – Close the display. Turn the unit over and install 4 new screws until snug, then turn another 45 degrees (1/8 turn).

8. Run SDT to verify functionality.

9. Install Feet if no further repairs are needed.

Prerequisite Steps:

Power off the device and disconnect from power.

Follow general safety and ESD compliance steps.

Remove the non-skid feet.

Remove the C-cover (either metal or fabric type).

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 or damaged, cease activities immediately.

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 beneath the rSSD. It should maintain good contact and not show signs of deterioration like collapsing or cracking.

Procedure – Installation (rSSD)

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

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, then turn it another 45 degrees (1/8 turn) or until fully fastened.

WARNING: Avoid slipping the screwdriver towards the battery during installation.

3. Install C-cover – Follow the steps for C-cover Keyboard Assembly installation (Metal or Fabric).

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 the Surface Diagnostic Toolkit 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 the non-skid feet.

WARNING: The AB-cover is extremely sensitive to ESD. Ensure all ESD safety precautions are taken. The defective part should be managed in the same manner as the new part to enable recovery.

IMPORTANT: The device must first be set in AB-cover Replacement Mode before the defective AB-cover is removed. If the display is non-functional, connect an external PC monitor to the device’s Mini-DP port.

Prerequisite Steps:

1. Enter AB-cover Replacement Mode: Connect a USB drive with the software tools to the device.

2. Connect the power supply.

3. Power on the device.

4. Run the software tool: `STEP1_DisplayModuleReplacement.cmd` and accept the power down prompt.

IMPORTANT: This step must be completed successfully before replacing the AB-cover display assembly.

5. Perform safety checks, remove feet, remove C-cover, and remove rSSD as per their respective procedures.

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 by first peeling on the bottom right corners. To prevent FPC damage, peel up the shield along its front edge, bend it to 45 degrees, and carefully pull vertically while twisting left and right.

4. Disconnect FPCs – Use a Spudger tool to disconnect the 4 exposed FPCs by prying upwards. Gently pull each FPC ribbon towards the front of the device to untuck it from under the chassis ledge.

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 – Place the display module at about 90 degrees. Then remove the remaining external screw at the left and right hinges while holding the display with your free hand.

7. Remove AB-cover from Device – Lift the display module straight up vertically until it is detached from the unit.

The installation process for the AB-cover varies between metal and fabric C-cover types. This procedure is for devices with a metal C-cover.

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

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

3. Connect AB-cover FPCs – Connect all 4 display module FPCs into their respective 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 the rSSD to enable device operation.

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

c. Connect the software tools USB drive.

d. Connect the power supply.

e. Power on the device using the C-cover’s power button.

f. Run the software tool: `STEP2_DisplayModuleReplacement.cmd`. The device will restart. Verify touch functionality.

g. Power off the device, remove the C-cover, and remove the rSSD.

IMPORTANT: If calibration fails, refer to the AB-cover Touch Calibration Retry section.

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 (left has 2 rectangular embosses, right has 3). Push shields vertically downwards until they snap 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 by peeling off the adhesive and snapping them into place. Press firmly to adhere.

9. AB-cover Hinge Alignment:

a. Set the 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 the 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. On the C-cover, remove the mylars covering the closure steels using tweezers.

b. Remove the old closure steels from the two regions at 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 steel into the left enclosure pocket, 2mm from the edge.

f. Using the back of the tweezers, press continuously and firmly along the steel for 80 seconds.

g. Place mylar tape over the steel, ensuring it is fully covered and overlaps onto the C-cover.

h. Use a Spudger tool to smooth and flatten the tape.

i. Repeat steps e-h for the right closure steel.

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

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

13. rSSD Install – Install the rSSD.

14. C-cover Install – Complete the C-cover installation procedure.

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

16. Install Feet – If tests pass, install the feet.

This procedure is for devices with a fabric C-cover.

1. Initial AB-cover Install – Clean 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).

2. Release Hinge Clamp Force – Turn all 4 screws 90 degrees (1/4 turn) counterclockwise.

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

4. Tuck FPCs – Use a guitar pick to tuck the loose portion of the FPCs under the enclosure lip.

5. Touch Calibration Steps:

a. Install the rSSD.

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 `STEP2_DisplayModuleReplacement.cmd`. Verify touch is working after restart.

g. Power off the device.

h. Remove the C-cover.

i. Remove the rSSD.

IMPORTANT: If calibration fails, refer to the AB-cover Touch Calibration Retry section.

6. FPC RF Shield Installation – Install 2 new shield lids over the FPC connectors, ensuring correct orientation (left has 2 embosses, right has 3). 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.

9. AB-cover Hinge Alignment:

a. Set Display Module to 90 degrees. Shift innermost screw on each side to be concentric with the hinge feature.

b. Verify alignment with a 0.40mm feeler gauge between the display and chassis.

c. Secure the hinge by turning all 6 hinge screws another 90 degrees (1/4 turn).

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

11. Check AB-cover alignment – Close the device and confirm flushness across the rear corners of each hinge. If not flush, repeat step 9.

12. rSSD Install – Install the rSSD.

13. C-cover Install – Complete the C-cover installation.

14. Run SDT to validate functionality.

15. Install Feet if tests pass.

A calibration routine is required when an AB-cover Display Assembly is replaced. 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 device must be functional enough to run the Windows OS. For secured devices, login credentials are required.

Run the calibration tools in accordance with the steps in the AB-cover Display Assembly Replacement Process.

The tools perform two functions:

Set device under repair into AB-cover replacement mode.

Perform touch calibration on the replaced (new) AB-cover.

Expected Tool Operation:

When `STEP1_DisplayModuleReplacement.cmd` is run:

Screen 1: Shows Step 1 initiation.

Screen 2: Indicates the device is in Servicing Mode and prompts for shutdown authorization (enter Y).

Screen 3 & 4: The tool confirms shutdown, and a Windows OS alert appears. The device shuts down, allowing for the physical replacement of the AB-cover.

When `STEP2_DisplayModuleReplacement.cmd` is run (after physical replacement):

Screen 1: Shows the tool is running.

Screen 2: Calibration preliminary testing begins.

Screen 3: A prompt appears reminding you not to touch the screen or plug in power during calibration.

Screen 4 & 5: The tool reports the calibration routine is in progress and then shows the results.

Screen 6: The tool initiates an OS restart. After the restart, touch functionality should be verified.

If an error screen appears indicating calibration failed, refer to the Touch Calibration Retry steps.

If touch calibration fails, it is necessary to take the following steps to retry the calibration process. The device must see a new AB-cover to accept new touch calibration data.

Touch Calibration Steps (Retry):

1. Preparation: Confirm the following steps have been completed:

a. Install rSSD to enable device operation.

b. Temporarily connect the C-cover FPC and set it in place to control the device.

c. Connect the software tools USB drive.

d. Connect the power supply.

e. Power on the device.

f. Run the software tool `STEP1_DisplayModuleReplacement.cmd` and accept the power down prompt.

2. Take the following steps:

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

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

c. Ensure an ESD-safe battery cover is in place to protect the battery.

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

3. Remove AB-cover: Remove the new AB-cover that was just installed and install another new AB-cover. Follow the procedure for AB-cover Display Assembly removal.

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

4. Preparation (Second Attempt): Confirm the following steps have been completed with the second new AB-cover:

a. Install rSSD.

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

c. Connect the software tools USB drive.

d. Connect the power supply.

e. Power on the device.

f. Run the software tool `STEP2_DisplayModuleReplacement.cmd`. The device will restart. Verify touch by running a finger across the screen.

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

6. Run SDT: Within the SDT tool, choose Select Tests, Touch Display Repair, and initiate by clicking on the 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 and sent back to Microsoft for repair.