Replacing The Front Panel Control Board - Lenovo ThinkCentre M70z Hardware Maintenance Manual

12. Install the screw that secures the new power switch module to the front bezel.
13. Install the 21 screws to secure the main bracket to the front bezel.
14. Reconnect all the cables that were disconnected.
15. Go to "Completing the parts replacement" on page 111.

Replacing the front panel control board

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 front panel control board.
To replace the front panel control board, 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.
4. Locate the front panel control board in the computer. See "FRU locations" on page 67.
5. Remove the 21 screws that secure the main bracket to the front bezel.
6. Note the locations of all cable connections that prevent you from lifting the computer main bracket, and
disconnect all cables. See "System board parts and connectors" on page 69.
7. Lift the main bracket off the front bezel.
8. Remove the three screws 1 that secure the front panel control board to the front bezel.
.
Chapter 8 Replacing FRUs
105