Lenovo ThinkCentre A85, Hardware Maintenance Manual

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10. Lower and position the heat sink fan duct on the top of the heat sink and fan assembly until the four
screw holes in the heat sink fan duct are aligned with the corresponding holes in the heat sink and fan
assembly. Then, install the four screws to secure the heat sink fan duct in place.
Figure 61. Installing the heat sink fan duct
11. To complete the replacement, go to “Completing the parts replacement” on page 138.
Replacing the optical drive
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 optical drive.
To replace the optical drive, 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 107.
3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 108.
4. Pivot the drive bay assembly upward. See “Accessing the system board components and drives” on
page 109.
5. Disconnect the signal cable and the power cable from the optical drive.
Chapter 9
.
Installing or replacing hardware: 0104, 0154, 7539, and 7548
125