Replacing The Ambient Light Sensor - Lenovo ThinkCentre M90z User Manual

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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 14.

4. Locate the ambient light sensor in the computer. See "Component locations" on page 10.

5. Carefully remove the two screws

sensor out of the computer.

Figure 29. Removing the ambient light sensor

6. Disconnect the ambient light sensor cable from the system board.

7. Align the screw holes in the new ambient light sensor with the corresponding holes in the computer

and then install the two screws to secure the ambient light sensor.

8. Connect the new ambient light sensor cable to the system board. See "System board part and

connector locations" on page 12.

ThinkCentre User Guide

that secure the ambient light sensor and then lift the ambient light

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