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9. Position the new front audio and USB assembly to the chassis so that the
screw hole in the new front audio and USB assembly is aligned with the
corresponding hole in the chassis.
10. Install the screw to secure the new front audio and USB assembly in place.
11. Pivot the drive bay assembly upward. Then, connect the new front audio and
USB assembly cables to the USB connector and the front audio connector on
the system board. See “Locating parts on the system board” on page 11.
12. Properly route the cables of the new front audio and USB assembly, and then
secure the cables with the cable clip on the chassis. See Figure 41 on page 47.
What to do next:
v To work with another piece of hardware, go to the appropriate section.
v To complete the replacement, go to “Completing the parts replacement” on
page 46.
Replacing the front fan assembly
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,goto:
http://www.lenovo.com/support
This section provides instructions on how to replace the front fan assembly.
To replace the front fan assembly, 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. Remove the computer cover. See “Removing the computer cover” on page 14.
3. Remove the front bezel. See “Removing and reinstalling the front bezel” on
page 15.
4. Pivot the drive bay assembly upward to gain access to the front fan assembly.
See “Accessing the system board components and drives” on page 17.
5. Remove the hard disk drive for easier access to the front fan assembly. See
“Replacing the hard disk drive” on page 38.
6. Remove the heat sink fan duct. See “Replacing the heat sink and fan
assembly” on page 24.
7. Note the cable routing and disconnect the front fan assembly cable from the
system fan connector on the system board. See “Locating parts on the system
board” on page 11.
Chapter 2. Installing or replacing hardware 43