IBM pSeries 670 Service Manual page 203

Step 152d-22
Turn off the power.
Examine the amber logic-power LEDs of all installed processor subsystem DCAs.
Step 152d-23
Are all amber logic-power LEDs of all installed processor subsystem DCAs off?
Yes Go to "Step 152d-24".
No Call for support.
Step 152d-24
Pull out the following books about 25 mm (1 inch), if present:
v Secondary I/O book, at location U1.18-P1-H3
v Third I/O book, at location U1.18-P1-H4
v Fourth I/O book, at location U1.18-P1-H1
v Capacitor book, at location U1.18-P1-V3
v Capacitor book, at location U1.18-P1-V7
Step 152d-25
Turn on the power.
Step 152d-26
Did the system stop with the same error code as recorded in "Step 152d-1" on page 180?
Yes Go to "Step 152d-32" on page 184.
No Go to "Step 152d-27".
Step 152d-27
One of the books just removed is defective.
Turn off the power.
Make sure all amber logic-power LEDs of all installed processor subsystem DCAs are off.
Step 152d-28
Reinsert one of the books that is pulled out and listed in "Step 152d-24".
Step 152d-29
Turn on the power.
Chapter 3. Maintenance Analysis Procedures
183