Replacing The Optical Drive - Lenovo THINKCENTRE 2491 Hardware Maintenance Manual

7. To install the new hard disk drive into the bracket, flex the bracket and align pin
pin 4 on the bracket with the corresponding holes in the hard disk drive. Do not touch the circuit
board 5 on the bottom of the hard disk drive.
Figure 12. Installing the hard disk drive into the bracket
8. Connect the signal cable and the power cable to the rear of the new hard disk drive.
9. Slide the new hard disk drive into the hard disk drive bay and pivot it down until it snaps into position.
10. Reconnect the power cable to the optical drive.
11. Go to "Completing the parts replacement" on page 98.

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 User Guide. To obtain a copy of the ThinkCentre User Guide, go to:
http://www.lenovo.com/ThinkCentreUserGuides
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. Open the computer cover. See "Opening the computer cover" on page 72.
3. Remove the front bezel. See "Removing and reinstalling the front bezel" on page 73.
4. Disconnect the signal cable and the power cable from the rear of the optical drive.
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ThinkCentre Hardware Maintenance Manual
1 , pin 2 , pin 3 , and