MICROSOFT SURFACE LAPTOP 3 1872 (01) PDF Document

The available models for the MICROSOFT SURFACE LAPTOP 3 1872 and related series 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 following terms are used for servicing the MICROSOFT SURFACE LAPTOP 3 1872:

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 1872:

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 the service 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 1872, follow these precautions:

For Autopilot managed Surface Products refer to the applicable posted guidelines.

Before opening the 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.

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. Contact Microsoft directly for proper device disposition.

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 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.

The MICROSOFT SURFACE LAPTOP 3 1872 contains a built-in, lithium-ion rechargeable battery. Follow these 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:

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 and installing the new battery pack.

Upon opening your MICROSOFT SURFACE LAPTOP 3 1872, 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.

Follow these instructions for handling used, damaged, or defective lithium-ion batteries from your MICROSOFT SURFACE LAPTOP 3 1872:

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.

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.

The following approach should be taken when troubleshooting your MICROSOFT SURFACE LAPTOP 3 1872:

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

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.

Prerequisite Steps:

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

Follow general safety and ESD compliance steps.

Position the device upside down on a clean, debris-free surface.

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. Use plastic tweezers/spudger to lift one edge, then grasp and pull the foot from the D-bucket.

2. Rear foot removal – 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 area carefully for any remaining liner, as it is clear and may be hard to see. Ensure IPA is completely dry before applying new feet.

Procedure – Installation (Non-Skid Feet)

1. Prepare new front feet – Remove the protective sheet to expose the adhesive. Align the 3 posts with their respective pockets on the bottom side 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 – Check for cosmetic damage or gaps between the feet and the D-bucket. If a gap exists, use a feeler gauge to verify it is smaller than 0.05 mm. If larger, replace the foot.

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

7. Run SDT – Run SDT to ensure all device features and functions operate as expected. It is recommended to let the device sit feet-down on a tabletop for at least 12 hours after installing new feet before transporting it.

This alternate procedure does not require clamps.

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. 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 it is smaller than 0.05 mm. If it is larger, replace the foot.

4. Prepare new back feet – To reassemble the back feet, remove the protective sheet to expose the adhesive. 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 – Place the keyboard and foot between your thumb and index finger as shown, and pinch the foot tightly with your thumb for 20 seconds.

6. Inspect for anomalies – Check for gaps. If a gap exists and is larger than 0.05 mm, replace the foot.

7. Run SDT – Run SDT to ensure all device features and functions operate as expected. Before transporting, it is recommended to let the device sit feet-down on a tabletop for at least 12 hours.

Prerequisite Steps:

Power off the device, disconnect from power, and follow general safety/ESD precautions.

Remove the non-skid feet.

Ensure all foot adhesive is removed from the bottom case foot sockets.

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. Be careful not to depress the power button.

2. Separate C-cover – Turn the device over and open the display. Grab the C-cover edge closest to the display and slowly remove the C-cover at an angle. Do not pull the C-cover apart beyond 45 degrees to avoid damaging the FPC.

3. Position for FPC removal – Angle and hover the C-cover so the antenna side faces down towards the device, making the C-cover 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. Place the C-cover in a safe place with the key/trackpad side down.

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

Procedure – Installation (Metal Type)

1. Pre-installation Inspection – Verify the battery’s condition and check for liquid damage indicators (LDI) inside the audio jack.

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

3. Install rSSD – Follow the rSSD installation procedure.

4. Remove tape – 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 FPC to the main board by pressing the connection with your finger.

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

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

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

9. Install Feet – If SDT passes, follow the procedure for installing the non-skid feet.

Prerequisite Steps:

Power off the device, disconnect from power, and follow general safety/ESD precautions.

Remove the non-skid feet.

Ensure all foot adhesive is removed from the bottom case foot sockets.

Procedure – Removal (Fabric Type)

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

2. Apply suction cups – Open the device. Place a suction cup in the bottom palm rest area, close to the edge. Do not place it on the trackpad. Hold down the corner hinge side of the cover while pulling up on the suction cup to separate the cover from the chassis hooks and magnets.

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

4. Angle C-cover – Angle the C-cover at approximately 45 degrees from horizontal. Do not exceed 45 degrees to avoid damage.

5. C-cover hook clearance – While maintaining the angle, pull the C-cover directly towards yourself to clear the hooks.

6. Disconnect FPCs – While hovering the C-cover, disconnect the FPC from the main board. Place the C-cover in a safe place with the key/trackpad side down.

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

Procedure – Installation (Fabric Type)

1. Pre-installation Inspection – Verify the battery’s condition and check for liquid damage indicators (LDI) inside the audio jack.

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

3. Install rSSD – Follow the rSSD installation procedure.

4. Remove tape – Remove 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 FPC to the main board.

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

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

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

9. Install Feet – If SDT passes, follow the procedure for installing the non-skid feet.

Prerequisite Steps:

Power off the device and disconnect from power.

Follow all general safety and ESD compliance steps.

Remove the non-skid feet.

Remove the C-cover keyboard assembly.

Procedure – Removal (rSSD)

1. Remove rSSD Screw – Use a 5IP (Torx-Plus) driver to remove the screw securing the rSSD. Be very careful to position your screwdriver directly over the screw to avoid slipping towards the battery.

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 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.

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.

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

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 steps for installing the non-skid feet.

Prerequisite Steps – Calibration Data Pull:

1. Connect a USB drive with the software tools to the device.

2. Connect the power supply.

3. Power on the device.

4. In the OS, run `STEP1_DisplayModuleReplacement.cmd` from the USB drive. Accept the power down prompt.

Disassembly Steps:

1. Follow safety procedures, remove feet, remove C-cover, and remove rSSD.

2. Disconnect Antenna Cable – Using angled tweezers, disassemble the left antenna cable to prevent damage.

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

4. Remove FPC RF Shield Cans – Using tweezers, peel up the two shield lids from the bottom right corners. Peel up along the front edge, bend to 45 degrees, and pull vertically while twisting to remove.

5. Disconnect FPCs – Use a Spudger tool to disconnect the 4 FPCs by prying upwards on the corners then the front edge. Gently pull each FPC ribbon towards the front to untuck it.

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

7. Set Display Angle – Place the display at a 90-degree angle. Remove the remaining external screw at the left and right hinges while holding the display.

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

Installation Procedure (Metal C-cover Device):

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

2. Release Hinge Clamp Force – Turn all 4 screws 90 degrees counterclockwise to release clamp force for 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.

5. Touch Calibration Steps:

a. Install 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` from the USB drive. 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 FPC connectors. Ensure correct shield type is used (left has 2 embosses, right has 3). Push shields vertically downwards to 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.

9. AB-cover Hinge Alignment:

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

b. Verify alignment by inserting a 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).

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

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

b. Remove the closure steels from the two front edge pockets.

c. Clean the closure steel area with IPA.

d-h. Install new closure steels about 2mm from the outside edge in each pocket, press firmly for 80 seconds, cover with mylar tape, and smooth the tape with a Spudger tool.

11. Fit C-cover – Follow C-cover reassembly steps 2-4 (do not install feet screws).

12. Check AB-cover alignment – Close the device and confirm flushness across the front edge. If not flush, readjust hinge alignment.

13. rSSD Install – Install the rSSD.

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

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

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

Prerequisite Steps – Calibration Data Pull:

1. Connect a USB drive with the software tools to the device.

2. Connect the power supply.

3. Power on the device.

4. In the OS, run `STEP1_DisplayModuleReplacement.cmd` from the USB drive. Accept the power down prompt.

Disassembly Steps:

1. Follow safety procedures, remove feet, remove C-cover, and remove rSSD.

2. Disconnect Antenna Cable – Using angled tweezers, disassemble the left antenna cable.

3. Remove FPC RF Baffles – Use tweezers to remove the left and right baffles from the RF shield cans.

4. Remove FPC RF Shield Cans – Peel up the two shield lids from the bottom right corners. Peel up along the front edge, bend to 45 degrees, and pull vertically while twisting to remove.

5. Disconnect FPCs – Use a Spudger tool to disconnect the 4 FPCs. Gently pull each FPC ribbon to untuck it.

6. Remove Inner Hinge Screws – Use a 6IP screwdriver to remove the 2 inner screws on both hinges.

7. Set Display Angle – Place the display at a 90-degree angle. Remove the remaining external screw at each hinge while holding the display.

8. Remove AB-cover – Lift the display module straight up to detach.

Installation Procedure (Fabric C-cover Device):

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). Tighten until snug, then turn another 90 degrees (1/4 turn).

2. Release Hinge Clamp Force – Turn all 4 screws 90 degrees counterclockwise.

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

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

5. Touch Calibration Steps:

a. Install rSSD.

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

c. Connect the software tools USB drive.

d. Connect the power supply.

e. Power on the device.

f. Run `STEP2_DisplayModuleReplacement.cmd`. The device will restart. Verify touch functionality.

g. Power off the device.

h. Remove C-cover.

i. Remove rSSD.

6. FPC RF Shield Installation – Install 2 new shield lids. Ensure correct shield type is used (left has 2 embosses, right has 3). Push to 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.

9. AB-cover Hinge Alignment:

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

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

c. Secure by turning all 6 hinge screws another 90 degrees.

10. Fit C-cover – Follow C-cover reassembly steps 2-4 (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, readjust hinge alignment.

12. rSSD Install – Install the rSSD.

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

14. Run SDT – Power on and run SDT to validate 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 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 tools from the Windows OS.

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

The tools perform two functions:

Set the device under repair into AB-cover replacement mode (Servicing Mode).

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

Expected Tool Operation:

When `STEP1_DisplayModuleReplacement.cmd` is invoked:

1. An initial screen indicates Step 1 initiation.

2. A second screen indicates the device has entered Servicing Mode and prompts you to authorize shutdown by entering ‘y’ or ‘Y’.

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

4. A Windows OS alert appears, noting the device will shut down. Close this window.

When `STEP2_DisplayModuleReplacement.cmd` is invoked after replacing the screen:

1. An initial screen indicates the tool is running.

2. Calibration preliminary device testing is initiated.

3. The tool prompts that calibration is about to begin, with a reminder not to touch the screen or plug in power.

4. The tool reports that the calibration routine is in progress and shows the results.

5. The tool initiates an OS restart, and an OS alert appears. Select ‘Close’ to allow the device to restart.

If the calibration fails, an error screen will appear with instructions.

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

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 the C-cover in place on the device chassis (no screws required).

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` 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. Ensure an ESD-safe battery cover is placed across the device 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 you installed and install another new AB-cover. The device under repair must see a new AB-cover to accept new touch calibration data.

4. Preparation (Retry): Confirm the following steps have been completed:

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`. 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.

The following tables list the available service parts for the MICROSOFT SURFACE LAPTOP 3 1872 and related models.

(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