IBM pSeries 690 Service Manual page 317

Step 152n-15
Replace the books in the following list, one at a time and in the listed order:
v DCA 1 at V1
v DCA 2 at V2
Step 152n-16
Turn on the power.
Step 152n-17
Did the system stop with the same error code as recorded in "Step 152n-1" on page 295?
Yes Go to "Step 152n-18".
No The book just replaced was defective. This ends the procedure. Return the system to its original
configuration. Go to "MAP 0410: Repair Checkout" in the RS/6000 and Eserver pSeries
Diagnostic Information for Multiple Bus Systems.
Step 152n-18
Turn off the power then make sure all the green "power good out" LEDs of both I/O subsystem DCAs are
off.
Step 152n-19
Remove the new card that was just installed in "Step 152n-15" and reinstall the original card.
Step 152n-20
Have all the cards listed in "Step 152n-15" been replaced with new or original cards??
Yes Go to "Step 152n-21".
No Go to "Step 152n-15".
Step 152n-21
Examine the green "power good out" LEDs of both I/O subsystem DCAs.
Step 152n-22
Are all the green "power good out" LEDs of both I/O subsystem DCAs off?
Yes Go to Step "Step 152n-23".
No Call for support.
Step 152n-23
Replace the DASD backplane.
Step 152n-24
Turn on the power.
Step 152n-25
Did the system stop with the same error code as recorded in "Step 152m-1" on page 291?
Yes Call for support.
No The book just replaced was defective. This ends the procedure. Return the system to its original
configuration. Go to "MAP 0410: Repair Checkout" in the RS/6000 and Eserver pSeries
Diagnostic Information for Multiple Bus Systems.
Chapter 3. Maintenance Analysis Procedures
297