Service manual

Removal and Replacement 7-33
6. Remove all the PCI/EISA options.
7. Remove the server control module.
8. Remove the PCI motherboards.
9. Remove both bridge modules from the system motherboard.
10. Remove the bracket holding the power cables in place as they pass from the
system bus section to the power section of the drawer.
11. Disconnect all cables to the system motherboard and lay them back over the
power supply section of the system drawer.
CAUTION: Secure the power harness connectors in the system card cage to
ensure that they cannot damage the pins in the CPU connectors.
12. Remove both the front and back module card guides. Unscrew the two screws
that hold the guides in place.
13. Remove the system motherboard from the card cage by removing the 15 Phillips
head screws holding it in place. Record the system serial number. (The serial
number is on a barcode on the side of the system drawer or on the system bus
card cage.)
Replacement
Reverse the above procedure. To align the motherboard in the cage, replace screws
in adjacent corners of the module. Subsequent screws should align properly.
Verification
1. Power up the system (press the Halt button if necessary to bring up the SRM
console) and issue the show device command at the console prompt to verify
that all system options are seen.
2. Restore the system serial number by issuing the set sys_serial_num command at
the SRM console prompt.