Replacing The Lcd Switch Board - Lenovo S40–40 Hardware Maintenance Manual

Step 7. Slide out the button board.
Step 8. To install the new button board:
a. Line up the holes on the new button board with the three mounting holes on the front bezel,
then place it into position.
b. Secure the button board with the three screws.
c. Connect the power cable to the new button board.
Step 9. Reattach the rear cover and stand.

Replacing the LCD switch board

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.
Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo
recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches
or other damage.
To replace the LCD switch board:
Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to "Left and right view"
and "Rear view" for help with locating the various connectors.
Step 4. Remove the computer stand. Refer to "Removing the frame stand", "Removing the monitor stand",
or "Removing the transformer stand".
Step 5. Remove the rear cover. Refer to "Removing the rear cover".
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Lenovo S40–40Hardware Maintenance Manual