Lenovo 4222, 4220, 4215, 4219, 4221 manual Replacing the front audio and USB assembly

Figure 37. Installing the rear fan assembly

8.Connect the rear fan assembly cable to the system fan connector on the system board.

9.To complete the replacement, go to “Completing the FRU replacement” on page 103.

Replacing the front audio and USB assembly

Attention

Do not open your computer or attempt any repair before reading and understanding the “Important safety information” in the ThinkStation Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkStation Safety and Warranty Guide, go to:

http://www.lenovo.com/support

This section provides instructions on how to replace the front audio and USB assembly.

To replace the front audio and USB 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 73.

3.Remove the front bezel. See “Removing and reinstalling the front bezel” on page 74.

4.Locate the front audio and USB assembly. See “Locating components” on page 70.

100Hardware Maintenance Manual