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Lenovo ThinkPad T480s Power Button Board Replacement

Lenovo ThinkPad T480s Power Button Board Replacement

Sarah Westberg

Sarah Westberg

Dernière mise à jour le October 11, 2021

2 - 4 heures
Modérée

Introduction

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Use this guide to replace the power button board in your Lenovo ThinkPad T480s laptop.

The power button board contains the button that turns on the computer when pressed. Diagnosing a faulty power button may be tricky since some of the symptoms are similar to a faulty battery or AC adapter. If you are pressing the power button but your laptop is not turning on, take a look at this Lenovo ThinkPad troubleshooting manual before attempting a power button board replacement.

If you need to perform a replacement, make sure to disable the internal battery, power down your device, and disconnect from any external power sources before you begin.

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  1. Lenovo ThinkPad T480s Power Button Board Replacement, Bottom Cover: étape 1, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement, Bottom Cover: étape 1, image 2 de 2

    • Disable the battery, power down the device, and unplug the power adapter from your device before proceeding/beginning the guide.

    • Loosen the six captive screws with a Phillips #1 screwdriver.

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  2. Lenovo ThinkPad T480s Power Button Board Replacement: étape 2, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 2, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 2, image 3 de 3

    • Remove the bottom cover with an opening tool.

    • Start from the top edge near the hinge and work your way along the edge until all of the clips are unsnapped.

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  3. Lenovo ThinkPad T480s Power Button Board Replacement: étape 3, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement: étape 3, image 2 de 2

    • Lift the bottom cover off.

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  4. Lenovo ThinkPad T480s Power Button Board Replacement, Battery: étape 4, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement, Battery: étape 4, image 2 de 2

    • Use the Phillips #1 screwdriver to remove four 4.5mm screws that hold the battery down to the mid frame.

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  5. Lenovo ThinkPad T480s Power Button Board Replacement: étape 5, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 5, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 5, image 3 de 3

    • Lift the battery near the connector and remove it from the system.

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  6. Lenovo ThinkPad T480s Power Button Board Replacement, Keyboard: étape 6, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement, Keyboard: étape 6, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement, Keyboard: étape 6, image 3 de 3

    • Disable the battery, power down, and unplug your device before you begin.

    • Pry the left and right trackpad buttons up with a spudger.

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  7. Lenovo ThinkPad T480s Power Button Board Replacement: étape 7, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement: étape 7, image 2 de 2

    • With a Phillips #0 screwdriver, loosen the two captive screws underneath the left and right trackpad buttons.

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  8. Lenovo ThinkPad T480s Power Button Board Replacement: étape 8, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 8, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 8, image 3 de 3

    • Wedge the spudger under the front edge of the keyboard to push the keyboard toward the back of the system.

    • Lift the front edge of the keyboard up by a few millimeters.

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  9. Lenovo ThinkPad T480s Power Button Board Replacement: étape 9, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement: étape 9, image 2 de 2

    • Gently, pull the keyboard out from the bezel and flip it over.

    • It is connected to the keyboard and trackpad cables so be sure not to yank it over to avoid tearing them.

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  10. Lenovo ThinkPad T480s Power Button Board Replacement: étape 10, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 10, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 10, image 3 de 3

    • Use the spudger to disconnect the trackpad cable from the system.

    • For more information on types of connectors, check out this guide.

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  11. Lenovo ThinkPad T480s Power Button Board Replacement: étape 11, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 11, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 11, image 3 de 3

    • Use the spudger to disconnect the keyboard cable from the system.

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  12. Lenovo ThinkPad T480s Power Button Board Replacement: étape 12, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement: étape 12, image 2 de 2

    • Lift the keyboard off of the palm rest.

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  13. Lenovo ThinkPad T480s Power Button Board Replacement, SSD: étape 13, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement, SSD: étape 13, image 2 de 2

    • Use the Phillips #1 screwdriver to remove one 2.8 mm screw securing the SSD.

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  14. Lenovo ThinkPad T480s Power Button Board Replacement: étape 14, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 14, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 14, image 3 de 3

    • Pull the SSD out of the socket.

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  15. Lenovo ThinkPad T480s Power Button Board Replacement, RAM: étape 15, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement, RAM: étape 15, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement, RAM: étape 15, image 3 de 3

    • Pull the plastic film back.

    • Push the clips outward to release the RAM stick.

    • My device doesn't have RAM so you don't see it.

    • The RAM stick will pop out at an angle. Pull the RAM stick out at the same angle.

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  17. Lenovo ThinkPad T480s Power Button Board Replacement, Wi-Fi Card: étape 16, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement, Wi-Fi Card: étape 16, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement, Wi-Fi Card: étape 16, image 3 de 3

    • Using the nylon spudger, pop the coaxial antenna wires off the Wi-Fi card.

    • When reassembling, reattach the gray wire closest to the screw and the black wire on the other side of the gray wire.

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  18. Lenovo ThinkPad T480s Power Button Board Replacement: étape 17, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement: étape 17, image 2 de 2

    • Use the Phillips #1 screwdriver to remove one 2.8mm screw holding the Wi-Fi card down to the motherboard.

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  19. Lenovo ThinkPad T480s Power Button Board Replacement: étape 18, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 18, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 18, image 3 de 3

    • Slide the Wi-Fi card out from the slot.

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  20. Lenovo ThinkPad T480s Power Button Board Replacement, WWAN Card: étape 19, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement, WWAN Card: étape 19, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement, WWAN Card: étape 19, image 3 de 3

    • Flip the cardboard cover off of the WWAN card.

    • Using the spudger, release the coaxial antenna wires from the WWAN card.

    • When reassembling, reattach the blue wire on the left and the orange wire on the right.

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  21. Lenovo ThinkPad T480s Power Button Board Replacement: étape 20, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement: étape 20, image 2 de 2

    • Use a Phillips #1 screwdriver to remove one 2.8mm screw.

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  22. Lenovo ThinkPad T480s Power Button Board Replacement: étape 21, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 21, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 21, image 3 de 3

    • Slide the WWAN card out from the slot.

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  23. Lenovo ThinkPad T480s Power Button Board Replacement, Fan Assembly: étape 22, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement, Fan Assembly: étape 22, image 2 de 2

    • Use the spudger to disconnect the fan cable from the motherboard.

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  24. Lenovo ThinkPad T480s Power Button Board Replacement: étape 23, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement: étape 23, image 2 de 2

    • Loosen the six captive screws attaching the fan assembly to the motherboard.

    • This system was missing the two screws by the fan but I have highlighted them to show where they are located.

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  25. Lenovo ThinkPad T480s Power Button Board Replacement: étape 24, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 24, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 24, image 3 de 3

    • Lift the thermal fan assembly from the system and remove it.

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  26. Lenovo ThinkPad T480s Power Button Board Replacement, SIM Card Tray: étape 25, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement, SIM Card Tray: étape 25, image 2 de 2

    • Insert the SIM eject bit or a paper clip in the hole of the SIM tray to eject it.

    • Remove the SIM tray.

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  27. Lenovo ThinkPad T480s Power Button Board Replacement, Motherboard: étape 26, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement, Motherboard: étape 26, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement, Motherboard: étape 26, image 3 de 3

    • Use the spudger to disconnect the LCD cable from the motherboard.

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  28. Lenovo ThinkPad T480s Power Button Board Replacement: étape 27, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 27, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 27, image 3 de 3

    • Use the spudger to disconnect the camera cable from the motherboard.

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  29. Lenovo ThinkPad T480s Power Button Board Replacement: étape 28, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 28, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 28, image 3 de 3

    • Remove all antenna cables from their routing.

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  30. Lenovo ThinkPad T480s Power Button Board Replacement: étape 29, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 29, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 29, image 3 de 3

    • Use the spudger to disconnect the SD card reader/audio card cable from the board.

    • The cable is attached to the board with adhesive so you will need to peel the cable up.

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  31. Lenovo ThinkPad T480s Power Button Board Replacement: étape 30, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 30, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 30, image 3 de 3

    • Use a connector puller or spudger to disconnect the coin cell battery from the board and pull the cable from the notch.

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  32. Lenovo ThinkPad T480s Power Button Board Replacement: étape 31, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 31, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 31, image 3 de 3

    • Use the spudger to disconnect the trackpad cable, the Hall sensor cable, and the smart card reader cable from the motherboard.

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  33. Lenovo ThinkPad T480s Power Button Board Replacement: étape 32, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 32, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 32, image 3 de 3

    • Disconnect the USB Card cable from the motherboard using the spudger.

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  34. Lenovo ThinkPad T480s Power Button Board Replacement: étape 33, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement: étape 33, image 2 de 2

    • Use the spudger to disconnect the power button cable from the motherboard.

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  35. Lenovo ThinkPad T480s Power Button Board Replacement: étape 34, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement: étape 34, image 2 de 2

    • Use the Phillips #1 screwdriver to remove the 4.6 mm screw from the USB-C bracket.

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  36. Lenovo ThinkPad T480s Power Button Board Replacement: étape 35, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement: étape 35, image 2 de 2

    • Lift the USB-C bracket from the system.

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  37. Lenovo ThinkPad T480s Power Button Board Replacement: étape 36, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement: étape 36, image 2 de 2

    • Use the Phillips #1 screwdriver to remove the 4.7 mm screw from the trap door.

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  38. Lenovo ThinkPad T480s Power Button Board Replacement: étape 37, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement: étape 37, image 2 de 2

    • Lift the trap door out.

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  39. Lenovo ThinkPad T480s Power Button Board Replacement: étape 38, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement: étape 38, image 2 de 2

    • Remove the 4.4 mm screw from the HDMI bracket using the Phillips #1 screwdriver.

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  40. Lenovo ThinkPad T480s Power Button Board Replacement: étape 39, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 39, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 39, image 3 de 3

    • Remove the HDMI bracket from the motherboard using your fingers.

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  41. Lenovo ThinkPad T480s Power Button Board Replacement: étape 40, image 1 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 40, image 2 de 3 Lenovo ThinkPad T480s Power Button Board Replacement: étape 40, image 3 de 3

    • Using the Phillips #1 screwdriver, remove four 3.1 mm screws from the motherboard.

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  42. Lenovo ThinkPad T480s Power Button Board Replacement: étape 41, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement: étape 41, image 2 de 2

    • Lift the motherboard from the chassis to remove it from the device.

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  43. Lenovo ThinkPad T480s Power Button Board Replacement, Power Button Board: étape 42, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement, Power Button Board: étape 42, image 2 de 2

    • Use the Phillips #1 screwdriver to remove a 3 mm screw from the board.

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  44. Lenovo ThinkPad T480s Power Button Board Replacement: étape 43, image 1 de 2 Lenovo ThinkPad T480s Power Button Board Replacement: étape 43, image 2 de 2

    • Remove the power button board from the system with your fingers.

    Modifier
Conclusion

To reassemble your device, follow these instructions in reverse order.

Take your e-waste to an R2 or e-Stewards certified recycler.

Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.

Auteur

Sarah Westberg

Membre depuis le 03/11/19

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