Lenovo 4219, 4220, 4222, 4215, 4221 manual Replacing the power supply assembly

Figure 16. Installing the optical drive

7. Connect the signal cable and the power cable to the new optical drive.

Figure 17. Connecting the optical drive

8.Reinstall the front bezel. See “Removing and reinstalling the front bezel” on page 74.

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

Replacing the power supply 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 power supply assembly.

82Hardware Maintenance Manual