System Board and I/O Board
Note: Before doing this procedure, review the safety notices at the start of this
chapter.
Attention: Do not try to separate the system board from the I/O board until both
boards are completely out of the drawer.
Removal
1. Place the drawer in the rear service position, as described in “Rear Service
Position” on page 7-23.
2. Do the removal procedure in “Memory Cards” on page 7-28.
3. Do the removal procedure in “CPU Card” on page 7-32.
4. Do the removal procedure in “Service Processor Card” on page 7-34.
5. Do the removal procedure in “Adapters” on page 7-35.
6. Remove the flexible fiberglass cable guard.
7. Note the locations of all cables that are connected to the I/O and system boards
and then disconnect all cables from the boards and position the cables away
from the I/O and system boards.
8. Remove the screws that hold the SSA connectors to the system unit frame, and
move the internal SSA cables and connectors away from above the I/O and
system boards.
9. Remove the parallel and serial connectors from the system unit frame.
10. Remove the screws that hold the keyboard, mouse, and power control interface
connectors to the system unit frame.
11. Remove the screws that hold the AUI Ethernet connector and the external SCSI
connector to the system unit frame.
12. Remove the 12 screws that attach the I/O board and the 9 screws that attach the
system board to the system unit frame.
Chapter 7. Removal and Replacement Procedures
7-37
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