Lenovo ThinkCentre 7570, Hardware Maintenance Manual

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Figure 31. 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 parts and connectors” on page 71.
9. Go to “Completing the parts replacement” on page 113.
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
This section provides instructions on how to replace the ambient light sensor.
Note: The ambient light sensor is available only in some models.
To replace the ambient light sensor, 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 73.
Chapter 8
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Replacing FRUs
99