Replacing The Card Reader - Lenovo ThinkCentre M93z Hardware Maintenance Manual

4. Locate the ambient light sensor. See "Locating major FRUs and CRUs" on page 71.
5. Carefully remove the two screws
sensor out of the computer.
Figure 38. 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 front bezel,
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 "Locating parts on the system
board" on page 74.
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 127.

Replacing the card reader

Attention:
Do not open your computer or attempt any repair before reading and understanding "Important Safety Information"
on page 1.
This section provides instructions on how to replace the card reader.
Note: The card reader is available only in some models.
To replace the card reader, 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 84.
1
that secure the ambient light sensor, and then lift the ambient light
.
Chapter 9 Replacing FRUs
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