IBM Power System POWER7 Series Common Service Procedures page 162

Did you encounter any problems?
Reinstall the operating system and continue with step 5.
No
Yes If the original problem still exists, replace the
field-replaceable unit (FRU) or perform the isolation
procedure that is next in the FRU list. If you have reached
the end of the FRU list, contact your next level of support.
If a new problem has occurred, go to Beginning problem
analysis.
3. Did you replace a FRU with the power turned on and concurrently with system operations?
No Go to step 5.
Yes Continue with the next step.
4. Did you use an AIX diagnostics service aid hot-swap operation to change the FRU?
Yes Go to step 6.
No Go to step 7.
5. If any FRUs have been removed that should be reinstalled, reinstall them now:
1. If the system is not powered on, power it on now.
2. Perform a slow boot.
3. Wait until the AIX operating system login prompt is displayed or until system activity on the operator panel or
display has stopped.
4. Did you encounter any problems?
No Continue at step 6.
Yes If the original problem still exists, replace the FRU or perform the isolation procedure that is next in the FRU
list. If you have reached the end of the FRU list, contact your next level of support.
If a new problem occurs, go to Beginning problem analysis.
6. If the Resource Repair Action menu is already displayed, go to step 9 on page 149; otherwise,
perform the following steps:
1. Log into the operating system either with root authority (if
needed, ask the customer to enter the password) or use the CE
login.
2. Enter diag -a command and check for missing resources. Follow
any instructions that are displayed. If an SRN displays, suspect a
loose card or connection. If no instructions are displayed, no
resources were detected as missing. Continue with the next step.
7. Perform the following steps:
148
Note: The AIX diagnostic service aid was
used if a resource was removed by using the
Hot Plug task.