MICROSOFT SURFACE LAPTOP 3 1873 (01) PDF Document

The following are the models for the MICROSOFT SURFACE LAPTOP 3 and 4 series:

The following terms are used when servicing your MICROSOFT SURFACE LAPTOP 3 1873:

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.

When repairing your MICROSOFT SURFACE LAPTOP 3 1873, the following tools are recommended:

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 1873:

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. The repair activities 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 repairing your MICROSOFT SURFACE LAPTOP 3 1873, please follow these 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.

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.

Review and follow the general guidelines and ESD compliance steps in this Guide prior to beginning work.

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.

Your MICROSOFT SURFACE LAPTOP 3 1873 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.

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.

Use the following best practices when handling batteries:

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

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

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

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

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

Avoid using tools that conduct electricity.

Do not drop or throw a lithium-ion battery.

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

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

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

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

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

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

Upon opening your MICROSOFT SURFACE LAPTOP 3 1873, 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.

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

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

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

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

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

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

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 of a battery thermal event:

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

The battery pouch suddenly expands in size.

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

Actions to take:

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

Contact local fire authorities if further assistance is needed.

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

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

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

If your MICROSOFT SURFACE LAPTOP 3 1873 visually exhibits any of the following symptoms, cease all further repair efforts:

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

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

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

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

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

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

(1) Non-Skid Feet

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

(3) Removable Solid-State Drive (NOTE: rSSD size must be same as original)

(4) AB-cover Display Assembly

The component localization codes for your MICROSOFT SURFACE LAPTOP 3 1873 are as follows:

The following approach should be taken when troubleshooting your MICROSOFT SURFACE LAPTOP 3 1873:

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

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. Ensure the IPA is completely dried off device and that no adhesive residue is left before applying new feet.

Procedure – Installation (Non-Skid Feet)

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.

This alternate procedure can be used if clamps are not available for installing non-skid feet on your MICROSOFT SURFACE LAPTOP 3 1873.

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

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

3. Inspect for anomalies – Inspect feet after pinching to ensure no cosmetic damage or gaps between the foot and the chassis exist. If a gap exists, use a feeler gauge to verify 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. Pinch replaced feet – Placing the keyboard and foot between your thumb and index finger as shown, pinch the foot tightly with your thumb and hold for 20 seconds.

6. Inspect for anomalies – Inspect feet to ensure no cosmetic damage or gaps between the feet and the D-bucket exist. If a gap exists, use a feeler gauge to verify 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.

Procedure – Removal (C-cover Keyboard Metal Type)

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

CAUTION: Take care to prevent depressing the keyboard power button. Ensure the driver is seated correctly to avoid stripping screw heads. Ensure all (4) screws are removed before proceeding.

2. Separate C-cover from device – Turn the device over into the standard use position and open the display. Grab the C-cover edge closest to the display and slowly remove the C-cover 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 (Flexible Printed Circuit).

3. Position C-cover for FPC removal – After lifting the C-cover completely from the magnets, angle and hover the C-cover so that 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 with a fingernail or Spudger tool.

CAUTION: When removed, place the C-cover with the key and trackpad side down and FPC facing up. It is recommended to place an ESD-safe battery cover over the device to protect the battery from accidental damage.

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

Procedure – Installation (C-cover Keyboard Metal type)

1. Pre-installation Device Inspection – Verify the battery’s condition and check the LDI (Liquid Damage Indicator) inside the audio jack. Devices with battery issues or activated LDI require whole unit replacement.

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

3. Install rSSD – Install the removable Solid-State Drive.

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

5. Connect C-cover FPC – Remove the battery cover. Hover the C-cover over the device and press the C-cover FPC connector onto the main board 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.

CAUTION: Ensure the C-cover is correctly aligned and seated 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. 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 the Surface Diagnostic Toolkit to ensure all device features and functions operate as expected.

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

Procedure – Removal (C-cover Keyboard Fabric Type)

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

2. Apply suction cups – Turn device over into 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 it on the trackpad. Do not wet the suction cup.

CAUTION: Place a thumb holding down the corner hinge side of the cover. Keep pressure on the hinge area to prevent the back edge of the cover from lifting while pulling up on the suction cup. If the suction cup releases, re-attach and try again.

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

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

6. Disconnect FPCs – While hovering the C-cover, disconnect the FPC from the main board by pulling up on the metal head vertically. Place the removed C-cover in a safe place with the key side down and FPC facing up. It is recommended to place an ESD-safe battery cover over the device.

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

Procedure – Installation (C-cover Keyboard Fabric type)

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

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

3. Install rSSD – Install the removable Solid-State Drive.

4. Remove tape from new C-cover FPC – Remove 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 press the FPC connector onto 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 C-cover area under the display will protrude slightly. Press firmly on this area until you hear a click and the C-cover flattens out.

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

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

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

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, 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)

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 C-cover Keyboard Assembly Replacement.

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

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

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

Before beginning, you must perform the prerequisite software steps to put the device in AB-cover Replacement Mode. This pulls calibration data from the old display.

1. 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`. Accept the power down prompt once the tool is run. This must be completed successfully before removing the old display.

After completing software prerequisites and removing the C-cover and rSSD, follow these steps:

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 to prevent damage 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 from one end.

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, then along the front edge. Grab each FPC connector and gently pull the 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 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 it is detached from the unit.

The installation process for the AB-cover varies depending on whether your MICROSOFT SURFACE LAPTOP 3 1873 has a metal or fabric C-cover. This procedure is for the metal C-cover device.

1. Initial AB-cover Install – Clean out any residual thread locker from the 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 to release clamp force for alignment.

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

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

5. Touch Calibration Steps:

a. Install 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 the software tool: `STEP2_DisplayModuleReplacement.cmd`. Follow prompts. The device will restart. Verify touch functionality.

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

6. FPC RF Shield Installation – Install 2 new shield lids above the 4 AB-cover FPC connectors. Ensure you install the correct shield on each side (left has 2 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 protector and snapping them into place. Press firmly along the top of the baffle wall to adhere.

9. AB-cover Hinge Alignment:

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

b. Verify alignment by inserting a 0.40mm plastic 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. Remove mylars covering the closure steels on the C-cover.

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

c. Clean the closure steel area with IPA.

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

e. Place one steel into the left pocket and press continuously for 80 seconds.

f. Place mylar tape over the steel and smooth it with a Spudger tool.

g. Repeat for the right closure steel.

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

12. Check AB-cover alignment – Close the device and check for flushness across the entire front edge. If not flush, adjust hinge alignment (step 9).

13. rSSD Install – Install the rSSD.

14. C-cover Install – Complete the C-cover installation, including screws.

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

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

The touch calibration routine is required when an AB-cover Display Assembly is replaced on your MICROSOFT SURFACE LAPTOP 3 1873. 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 tool runs within Windows, so the device must be functional. You may need login credentials.

STEP 1: Setting Replacement Mode (before removing old display)

1. Run `STEP1_DisplayModuleReplacement.cmd`.

2. An initial screen will indicate Step 1 initiation.

3. A prompt will indicate the device has entered Servicing Mode and ask to authorize shutdown. Enter ‘y’ or ‘Y’ and press ENTER.

4. The tool confirms shutdown authorization, and a Windows OS alert will appear. The device will shut down, allowing you to proceed with the display replacement.

STEP 2: Calibrating New Display (after installing new display)

1. Run `STEP2_DisplayModuleReplacement.cmd`.

2. An initial screen indicates the tool is running.

3. Calibration preliminary device testing will be initiated.

4. The tool will prompt that calibration is about to begin, reminding you NOT to touch the screen or plug in power.

5. The tool reports that the calibration routine is in progress.

6. The tool reports the results of the calibration process (e.g., “Calibration completed successfully”).

7. The tool initiates an OS restart. An OS alert will appear. The device will restart to complete the process.

If the tool reports an error, refer to the touch calibration retry procedure.

If touch calibration fails on your MICROSOFT SURFACE LAPTOP 3 1873, 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 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`. 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 a Microsoft provided 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 under repair must see a new AB-cover in order to accept new touch calibration data. This step must be carried out to re-enable touch calibration.

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

All waste electrical and electronic equipment (WEEE), waste electronic components, waste batteries, and electronic waste residuals from your MICROSOFT SURFACE LAPTOP 3 1873 must be managed according to applicable laws and regulations and H09117, “Conformance Standards for Environmentally Sound Management of Waste Electrical and Electronic Equipment (WEEE).”