Did the light on the device go on and remain on?
No Yes
↓ After exchanging an item, go to “Verifying the Repair” on page 920.
This ends the install procedure.
e. Attempt the device concurrent maintenance procedure again without
physically moving the unit.
Did the light above the device go on and remain on?
No Yes
↓ After exchanging an item, go to “Verifying the Repair” on
page 920.This ends the install procedure.
f. There is a power problem. Either:
v The new unit is defective.
v The backplane was damaged during the device concurrent maintenance
procedure.
v There is a new problem with the power subsystem.
This ends the procedure.
Models 830/SB2 with FC 9074 – System Unit Backplane (MB1)
Attention: When replacing the system unit backplane (MB1) on a model 830/SB2
it is ″required″ that the processor cards be replaced also (For additional
information, refer to the “Model 830/SB2 – Processor Feature Codes and CCINs”
on page 890).
Perform the following:
1. Power off the system (see “Powering On and Powering Off the System and
Logical Partitions” on page 922).
2. Open the rear cover and unplug the AC power cord from the FC 9074 Base
I/O tower.
Refer to “Assembly 3: Models 830 and SB2 with FC 9074 – Final Assembly, Rear”
on page 814 and continue with the following steps.
3. Label and remove the cables from the rear of the processor/CEC cage
assembly.
4. Remove the mounting screws from the EMC shield that is covering the
processor/CEC cage assembly.
5. Remove the EMC shield.
6. Remove the mounting screws from the Processor/CEC cage assembly.
7. Remove the EMC access plate that is located directly above the PCI cage
(CB1).
8. Reach under the processor/CEC cage assembly and remove the Internal
(copper) HSL cable and the three ribbon cables from the System Unit
Backplane.
9. Reach under the processor/CEC cage assembly and loosen the thumbscrew on
the interlock plate.
10. Pivot the interlock plate downward.
11. Grasp the handle bar on the processor/CEC cage and pull the drawer out
until it stops.
Remove and Replace Procedures
Chapter 4. Removal and Installation Procedures 673
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