Lenovo ThinkCentre M91p Hardware Maintenance Manual - Page 145

10. To complete the installation or replacement, go to "Completing the parts replacement" on page 160. 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. Turn off the computer and disconnect all power cords from electrical outlets. 2. Open the computer cover. See "Opening the computer cover" on page 121. 3. Remove the front bezel. See "Removing and reinstalling the front bezel" on page 122. 4. Remove the hard disk drive. See "Replacing the hard disk drive" on page 134. 5. Press the blue retaining clip to pivot the optical drive bay upward. Figure 73. Pivoting the optical drive bay 6. Disconnect the signal cable and the power cable from the rear of the optical drive. Chapter 9. Replacing FRUs (Machine Types: 4466, 4471, 4474, 4477, 4480, 4485, 4496, 4498, 4503, 4512, 4514, 4518, 4554, 7005, 7023, 7033, 7035, 7072, 7079, and 7177.) 137