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To replace the multi-touch board, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 15.
4. Locate the multi-touch board in the computer. See “Component locations” on page 11.
5. Note the multi-touch board cable routing and disconnect the three multi-touch board cables from
the system board and the multi-touch screen.
6. Carefully remove the two screws 1 that secure the multi-touch board and then lift the multi-touch
board off the computer main bracket.
Figure28. Removing the multi-touch board
7. Align the screw holes in the new multi-touch board with those in the computer main bracket and then
install the two screws to secure the multi-touch board.
8. Connect the new multi-touch board cables to the system board and the multi-touch screen. See
“System board part and connector locations” on page 12.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 52
.
Replacing the ambient light sensor
Attention:
Do not open your computer or attempt any repair before reading and understanding the “Important safety information”
in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre
Safety and Warranty Guide, go to:
http://www.lenovo.com/support
Chapter 2. Installing or replacing hardware 37