Step 3
Try to boot and run standalone diagnostics against the system, particularly against the intended boot
device.
If diagnostics boot successfully:
1. Go to the Task Selection Menu and select Display Configuration and Resource List. If the intended
boot device is not listed, go to ″MAP 0290: Missing Resource Problem Resolution″ in the RS/6000 and
Eserver pSeries Diagnostic Information for Multiple Bus Systems.
2. If an SRN, not an 8-digit error code, is reported, go to the RS/6000 and Eserver pSeries Diagnostic
Information for Multiple Bus Systems manual.
3. If the diagnostics are successful, it may be necessary to perform an operating system-specific recovery
process, or reinstall the operating system.
If diagnostics do not boot successfully:
1. Verify proper SCSI bus termination.
2. Check SCSI cabling.
3. It is possible that another attached SCSI device is causing the problem. Do the following:
a. Disconnect the signal and power cables from the disk drive cage backplane.
b. Disconnect the disk drive(s) in the disk drive cage from the backplane.
c. Disconnect the signal and power cables from any other SCSI devices attached to the SCSI adapter
that the CD-ROM drive is attached to.
d. Try to boot the standalone diagnostics again.
e. If you are still unable to load standalone diagnostics, go to “Step 4.”
f. If standalone diagnostics load, one of the disconnected devices is causing the problem. Reconnect
the devices one at a time and retry the boot operation until the problem recurs and replace the
device that caused the problem. (If the problem appears to be one of the disk drives in the disk
drive cage, be aware it could be either the disk drive or the backplane.) Go to ″MAP 0410: Repair
Checkout″ in RS/6000 and Eserver pSeries Diagnostic Information for Multiple Bus Systems.
Step 4
It is possible that another installed adapter is causing the problem. Do the following:
1. Remove all installed adapters except the one the CD-ROM drive is attached to and the one used for
the console.
2. Try to boot the standalone diagnostics again.
3. If unable to load standalone diagnostics, go to “Step 5” on page 157.
4. If standalone diagnostics load, reinstall adapters (and attached devices as applicable) one at a time
and retry the boot operation until the problem recurs. Then replace the adapter or device that caused
the problem. (The system board can also cause the device or adapter to fail.) Go to ″MAP 0410:
Repair Checkout″ in RS/6000 and Eserver pSeries Diagnostic Information for Multiple Bus Systems.
156 Service Guide
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