Lenovo ThinkCentre M70z Hardware Maintenance Manual (HMM) - Page 103

Replacing the ambient light sensor

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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 69. 9. Go to "Completing the parts replacement" on page 111. 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 71. Chapter 8. Replacing FRUs 97

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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 69.
9. Go to “Completing the parts replacement” on page 111.
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:
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 71.
Chapter 8
.
Replacing FRUs
97