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Chapter 9. Replacing FRUs (machine types: 10A2, 10A3, 10A8,
10A9, 10AH, 10AJ, 10AM, and 10AN)
This chapter provides information about the FRU replacement instructions.
Important: Be sure to read and understand Chapter 1 "Safety information" on page 1 before replacing any
FRU. These precautions and guidelines will help you work safely.
Note: FRU replacements are to be done only by trained service technicians.
Installing external options
You can connect external options to your computer, such as external speakers, a printer, or a scanner. For
some external options, you must install additional software in addition to making the physical connection.
When installing an external option, see "Locating connectors, controls, and indicators on the front of your
computer" on page 76 and "Locating connectors on the rear of your computer" on page 76 to identify the
required connector. Then, use the instructions that come with the option to help you make the connection
and install any software or device drivers that are required for the option.
Removing the computer cover
Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 "Safety information" on page 1.
This section provides instructions on how to remove the computer cover.
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 any media from the drives and turn off all attached devices and the computer.
2. Disconnect all power cords from electrical outlets.
3. Disconnect the power cord, Input/Output cables, and any other cables that are connected to the
computer.
4. Remove the screws that secure the computer cover. Then, press the cover-release button on the side of
the computer and slide the computer cover to the rear of the computer to remove it.
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