MICROSOFT SURFACE LAPTOP 4 1953 (01) PDF Document

The models covered are:

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:

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:

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, follow these precautions:

For Autopilot managed Surface Products refer to the guidelines posted at the relevant Microsoft support page.

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, and 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.

Ensure your work surface is level/flat and covered with an 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.

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 the 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 the guide before beginning work.

Check to make sure that general guidelines and ESD compliance steps are followed prior to starting activities.

This device 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, we recommend using genuine Microsoft replacement parts. Use of non-Microsoft (non-genuine), incompatible, reused, or modified batteries could cause battery overheating, expansion, venting, leaking, or a thermal event.

Before beginning device repair, ensure your workspace is free of flammable debris or materials, has adequate ventilation, and that you have a fire suppressant device (example: fire blanket, container of sand, Class B fire extinguisher) within easy reach or you are 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 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 device opening, we recommend 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 these signs must be replaced.

Follow these guidelines for handling used, damaged, or defective Lithium-Ion batteries:

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.

Undamaged, used lithium batteries can be sent to e-waste recycling or household hazardous waste collection points for processing.

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:

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 any Microsoft device visually exhibits any of the following symptoms, cease all further repair efforts and contact Microsoft Surface Customer Support to report and obtain next steps:

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. Microsoft Surface Customer Support will ask you to provide the following information:

The model and serial number of the affected Microsoft Surface device and/or accessory(ies).

A brief description of the damage found.

Clear photographs depicting the symptoms observed.

Note: 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.

Component Localization Codes

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

The following approach should be taken when troubleshooting Surface devices:

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.

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)

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.

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.

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, or 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 the front foot, remove the protective sheet to expose adhesive on the foot. 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. Complete the 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 the 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 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 the protective sheet to expose adhesive on the foot. Insert the foot into the pocket on the bottom side of the unit and hand press the foot in until it 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 the 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, or other types of carriers, until at least 12 hours after installing new feet.

Prerequisite Steps:

Power off the device and disconnect it from power.

Follow all general safety and ESD guidelines.

Remove the 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 the power button is accidentally depressed and the device turns on, shut down the device as normal through the 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 the device over into the standard use position and open the AB-cover display exposing the C-cover keyboard. Grab the C-cover edge closest to the display and slowly remove the C-cover at an angle as shown in the drawing. The C-cover is secured with magnets in addition to the screws.

CAUTION: Do not pull the C-cover apart beyond 45 degrees otherwise damage to C-cover FPC could occur.

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 C-cover FPC is accessible.

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

CAUTION: When removed from the device, place the C-cover in a safe place with the key and trackpad side down and FPC facing up to avoid bending/creasing the FPC. Be sure the key and trackpad side of the C-cover is protected from cosmetic damage during storage.

IMPORTANT: Remove rSSD (removable Solid-State Drive) whenever C-cover is removed from device.

Procedure – Installation (C-cover Keyboard Metal type)

1. Pre-installation Device Inspection – Verify the battery’s condition. Devices with battery issues require whole unit replacement. Verify the condition of the LDI (Liquid Damage Indicator) inside the audio jack. Any color other than white indicates liquids have entered the device, which requires whole unit replacement.

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

3. Install rSSD – Follow the rSSD installation procedure.

4. Remove tape from new C-cover FPC – Tape secures the C-cover FPC during shipping. Remove this tape before continuing with assembly.

5. Connect C-cover FPC – Hover the C-cover over the device while assembling the C-cover FPC to the main board by pressing the connection using your finger.

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

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

CAUTION: Ensure that the C-cover is correctly aligned and seated before closing the device. There is the risk of breaking the display if the device lid is closed before C-cover is aligned.

7. Install C-cover Screws – Close the AB-cover. Turn the unit over and use a 5IP screwdriver to install 4 new screws to secure the C-cover. 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 and no further repairs are to be performed on the device, follow steps for installing non-skid feet.

Prerequisite Steps:

Power off the device and disconnect it from power.

Follow all general safety and ESD guidelines.

Remove the 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: Ensure all (4) screws are removed before starting C-cover removal to avoid damage. Fabric C-covers utilize magnets and a hook latching onto the chassis, unlike metal C-covers.

2. Apply suction cups – Turn the device to its standard use position and open the display. Place a suction cup in the bottom palm rest area, as close to the edge as possible. Do not place the suction cup on the Trackpad.

CAUTION: Do not wet the suction cup as liquid could stain the keyboard fabric. Place a thumb holding down the corner hinge side of the cover closest to you. 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 it and try again.

3. Separate C-cover from device – Once 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 angle more than 45 degrees to avoid damaging the C-cover hook or FPC.

5. C-cover hook clearance – Once angled, keep the angle of the C-cover while pulling it 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 the rSSD whenever the C-cover is removed.

Procedure – Installation (C-cover Keyboard Fabric Type)

1. Pre-installation Device Inspection – Check the battery and Liquid Damage Indicator (LDI) status. Any issues require whole unit replacement.

2. Check for unexpected items within device – Inspect the C-cover 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 – Hover the C-cover over the device and connect the FPC to the main board by pressing the connection with your finger.

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. 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 the C-cover is correctly aligned and seated before closing the lid to avoid 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. Tighten until just snug, then turn another 45 degrees (1/8 turn).

8. Run SDT – Run the Surface Diagnostic Toolkit to verify functionality.

9. Install Feet – If no other repairs are needed, install the non-skid feet.

Prerequisite Steps:

Power off the device and disconnect it from power.

Follow all general safety and ESD guidelines.

Remove the non-skid feet.

Remove the C-cover keyboard assembly (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, 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 once it has been removed. The thermal pillow should maintain good contact with an installed rSSD and should not have physical evidence of deterioration such as collapsing or excessive cracking. The outside mylar layer of the foam should be intact and no foam should be visible from above.

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

WARNING: Be very careful to position your screwdriver directly over the rSSD screw and to avoid slipping towards the battery.

3. Install C-cover – Follow the steps for installing the C-cover Keyboard Assembly (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 SDT to ensure all device features and functions operate as expected. If SDT tests pass and no further repairs are to be performed, continue with the final assembly steps.

6. Install Feet – Follow the procedure for installing 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 when handling the AB-cover assembly.

Prerequisite Steps:

1. Enter AB-cover Replacement Mode: This step pulls calibration data from the old AB-Cover. Connect the software tools USB drive to the device under repair. Connect the power supply. Power on the device.

2. Run software tool: At the device OS, use Windows Explorer, navigate to the USB drive and run: `STEP1_DisplayModuleReplacement.cmd`. Accept the power down prompt once the tool is run.

IMPORTANT: This step must be carried out successfully before the broken/faulty AB-cover is replaced. Retry if an error message is received.

3. Perform disassembly: Follow all general safety guidelines. Remove the feet, C-cover, and 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. This will prevent the antenna cable from being damaged during shield removal.

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 starting from one end of the baffle.

3. Remove FPC RF Shield Cans – Using tweezers, remove the two shield lids by first peeling on the bottom right corners. To prevent damage to the FPCs, 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 as you pull towards you 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. Grab each FPC connector and gently pull the ribbon towards the front of the device to untuck it from underneath 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 AB-cover Display Angle to 90 deg for Safe Removal – Place the display module at an angle of 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 detached from the unit.

The installation procedure varies depending on whether your device has a Metal or Fabric C-cover. Follow the specific instructions for your device type.

1. Initial AB-cover Install – Clean out any residual thread locker from the hinge screw holes. Set the new AB-cover in place in the device chassis hinge wells and hold it while installing 2 new outer screws on each hinge (4 total). Screws should be installed until just snug and seated, and then turned 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 from those screws for later alignment.

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

4. Tuck FPCs – Using a guitar pick opening tool, 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: The new AB-cover must be calibrated.

a. Install the rSSD.

b. Temporarily connect the C-cover FPC to the main board and set the C-cover in place without screws.

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 `STEP2_DisplayModuleReplacement.cmd` from the USB drive. Follow prompts; the device will restart. Verify touch is working.

g. Power off the device, remove the C-cover, and remove the 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 (left-hand has 2 embosses, right-hand 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 protector and snapping them into place. Press firmly along the top of the baffle wall 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. If not, re-align.

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. Remove mylars covering the closure steels on the C-cover 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 the left closure steel into the left pocket.

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

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

h. Smooth the tape with a Spudger tool.

i. Repeat 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 check the flushness across the entire front edge. If not flush, remove AB-hinge screws, repeat step 9, and then reassemble the C-cover.

13. rSSD Install – Follow the rSSD installation procedure.

14. C-cover Install – Follow the C-cover (metal type) installation procedure, including screws.

15. Run SDT – Power on and validate full functionality.

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

1. Initial AB-cover Install – Clean any residual thread locker from hinge screw holes. Set the new AB-cover in place in the device chassis hinge wells and hold while installing 2 new outer screws on each hinge (4 total). Tighten screws until 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 for later alignment.

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

4. Tuck FPCs – Use a guitar pick to carefully tuck the loose portion of the FPCs under the enclosure lip, ensuring the FPC is taut.

5. Touch Calibration Steps: The new AB-cover must be calibrated.

a. Install the rSSD.

b. Temporarily connect the fabric C-cover’s FPC and set it in place without screws.

c. Connect the software tools USB drive.

d. Connect the power supply.

e. Power on the device.

f. Run `STEP2_DisplayModuleReplacement.cmd` from the USB drive. Follow prompts, the device will restart. Verify touch works.

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

6. FPC RF Shield Installation – Install 2 new shield lids over the 4 AB-cover FPC connectors, ensuring correct orientation (left has 2 embosses, right has 3). Push down 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 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 to be concentric with the circular feature on the hinge.

b. Verify alignment with a 0.40mm feeler gauge between the display and chassis. If the gauge doesn’t slide smoothly, re-align.

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

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

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

12. rSSD Install – Follow the rSSD installation procedure.

13. C-cover Install – Follow the C-cover (fabric type) installation procedure, including screws.

14. Run SDT – Power on and validate full device functionality.

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

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 – Directory Structure and Files

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

Folder: Project

File: STEP1_DisplayModuleReplacement.cmd

File: STEP2_DisplayModuleReplacement.cmd

Tool Runtime Details

The device under repair must be functional to the point that it can run the Windows OS.

For devices with secured Windows login, credentials are required.

Once the device is running and logged into Windows, use Windows Explorer to navigate to the USB drive.

Run the calibration tools in accordance with the process steps within 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.

When STEP1_DisplayModuleReplacement.cmd is invoked:

1. An initial screen indicates Step 1 initiation.

2. The tool indicates the device has been set into AB-cover replacement mode (Servicing Mode). You will be prompted to authorize device shutdown by entering ‘y’ or ‘Y’ and pressing ENTER.

3. The tool confirms the shutdown authorization and a countdown begins.

4. A Windows OS alert appears noting the shutdown. Select Close, and the device will shut down to enable the next repair steps.

When STEP2_DisplayModuleReplacement.cmd is invoked:

1. An initial screen indicates the tool is running.

2. Calibration preliminary device testing begins, running sanity tests and shorts tests.

3. The tool prompts that calibration is about to begin with reminders: DO NOT TOUCH THE SCREEN OR USE PEN – DO NOT PLUG IN POWER.

4. The tool reports that the calibration routine is in progress, completes calibration, and validates maps.

5. The tool reports the results of the calibration process, showing that TDM was replaced successfully.

6. The tool initiates an OS restart, and an OS alert informs you the device will restart. Select Close.

If the calibration fails, an error screen will appear with prompts to follow. If a retry fails, refer to the touch calibration retry section.

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

Touch Calibration Steps (Retry):

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

a. Install rSSD to enable device operation.

b. Temporarily connect the C-cover FPC back on to the device main board connector and set the C-cover in place on the device chassis (no screws required).

c. Connect the software tools USB drive to the device.

d. Connect the power supply to the device.

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

f. Run the software tool `STEP1_DisplayModuleReplacement.cmd` from the USB drive. Accept the power down prompt once the tool is run.

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. Place an ESD-safe battery cover across the device to protect the battery from accidental damage.

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

3. Remove AB-cover – Remove the new AB-cover that was installed 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.

4. Preparation (Round 2) – Confirm the following steps have been completed again:

a. Install the 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`. Follow prompts; the device will restart. Verify touch by running a finger across the screen.

5. Navigate to USB key with software tools – Using Windows Explorer, navigate to the USB drive and run the SDT tool.

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