Lenovo ThinkCentre 7570, Hardware Maintenance Manual, Page: 107 / 208

7. Disconnect the ambient light sensor cable from the system board.
8. 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.
9. Connect the new ambient light sensor cable to the system board. See “System board parts and
connectors” on page 71.
10. Position the handle bar so that the screw holes can align with the corresponding holes in the computer,
and then install the four screws to secure the handle bar.
11. Go to “Completing the parts replacement” on page 113.
Replacing the internal speakers
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 internal speakers.
To replace the internal speakers, 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.
4. Locate the internal speakers in the computer. See “FRU locations” on page 69.
5. Note the location of the internal speaker cable connection. Note the routing of the internal speaker
cables. Disconnect the internal speaker cables from the system board.
6. Remove the two screws 1 that secure each internal speaker to the front bezel, and then remove the
internal speakers from the computer.
Chapter 8
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Replacing FRUs
101