Predisassembly procedures
CAUTION: To avoid personal injury, equipment damage, or data loss, read the sections on Warnings
and cautions and the Safety and Regulatory Information for the computer before servicing components.
Perform the following steps before servicing a computer:
1. Locate and clear a suitable work area.
2. Close all open software applications.
3. Remove all USB keys, diskettes, CDs, and DVDs from the computer.
4. Shut down the operating system.
5. Power off the computer and all peripheral devices connected to it.
6. Remove or disengage security devices that prevent you from opening the computer.
7. Disconnect the power cord from the electrical outlet and then from the computer.
8. Disconnect peripheral device cables from the computer.
9. If the computer is on a stand, remove the computer from the stand.
10. Gather the tools.
11. Service the computer.
12. Restore power to the computer when servicing is done.
68 Chapter 5 Replacing components ENWW
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