3. Disconnect all cables attached to the computer. This includes power cords,
input/output (I/O) cables, and any other cables that are connected to the
computer.
4. Remove any locking devices such as a padlock that secure the cover.
5. Remove the two screws at the rear of the computer cover and slide the cover to
the rear.
Locations
The following illustration will help you locate the major FRUs in the computer.
1 Fan plenum, fan,
and heat sink

6 Diskette drive

2 Microprocessor 7 Front panel card

3 Optical drive 8 Memory modules

4 Power switch/LED

assembly

9 System board

5 Hard disk drive 10 Power supply

Chapter 9. Replacing FRUs (Types 7390, 7391, 7392, 7396, 7397, and 7398) 115