IBM 6643 User Manual page 85

To change the battery, do the following:
1. Turn off the computer and all attached devices.
2. Remove the rear cover. See "Removing the rear cover" on page 40.
3. Remove the hard disk drive. See "Removing the hard disk drive" on
page 42.
4. Remove the system board cover. See "Removing the system board cover"
on page 43.
5. Remove the old battery 1 .
6. Install the new battery.
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Chapter 6. Troubleshooting