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Figure 20. Installing a new optical drive
8. Connect the signal cable and the power cable to the rear of the optical drive.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 32.
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 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 power supply assembly.
To replace the power supply assembly, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Disconnect the power cords, Input/Output cables, and any other cables that are connected to the
computer.
3. Remove the four screws at the rear of the chassis that secure the power supply assembly.
22 ThinkCentre User Guide