IBM H Series Installation And Service Manual page 105

Step 2010-8
Are all LEDs on the drives in a six pack off?
NO Go to step "Step 2010-11."
YES Go to "Step 2010-9."
Step 2010-9
Are any power cables loose or in need of replacement?
NO Go to "Step 2010-10."
YES Fix or replace the power cables as required. Go to MAP 410: Repair
Checkout in Diagnostic Information for Multiple Bus Systems to verify the
repair.
Step 2010-10
Replace the backplane. Go to MAP 410: Repair Checkout in Diagnostic Information
for Multiple Bus Systems to verify the repair.
Step 2010-11
Is there only one drive with no LEDs on?
NO Go to step "Step 2010-12" on page 2-72.
YES Replace the the following FRUs:
1. Backplane
2. Disk drive assembly
Go to MAP 410: Repair Checkout in Diagnostic Information for Multiple
Bus Systems to verify the repair.
Chapter 2. Maintenance Analysis Procedures
2-71