Lenovo ThinkCentre M53, Hardware Maintenance Manual

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12. Install the screw that secures the optical drive box on the VESA mount bracket.
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Figure 35. Installing the screw that secures the optical drive box
13. Connect the external hard disk drive cable to a USB connector on the computer. See “Locating
connectors on the rear of your computer” on page 29.
Removing the computer cover
Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 “Read this first: Important safety information” on page 1.
CAUTION:
Before you open the computer cover, turn off the computer and wait several minutes until the
computer is cool.
To remove the computer cover, 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 any locking device that secures the computer cover, such as a Kensington-style cable lock.
See “Attaching a Kensington-style cable lock” on page 57.
Chapter 11
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Installing or replacing hardware
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