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Step 19
(from Step 1)
This problem can be caused by:
– a SCSI device pulling the bus down or opening the PTC on the SCSI adapter.
– a defective SCSI adapter
– a defective terminator
– a defective system interface board (SIB)
– a defective cable
The most likely problem is the SCSI adapter or a device pulling the bus down or opening the
PTC. Always allow the system to cool for 5 minutes between power cycles so that the PTC
can reset.
1. Set the power button on the CPU Enclosure to Off.
2. Unplug both PDB outlet power cords from both power supply power cords.
3. Remove all SCSI Adapters except the one you are trying to boot from.
4. Plug both PDB outlet power cords into both power supply power cords.
5. Set the power button on the CPU Enclosure to On.
6. Insert the diagnostic CD-ROM into the CD-ROM drive.
7. If the Maintenance Menu is displayed, select System Boot, Boot From List.
8. Wait for one of the following conditions to occur:
The system stops with a flashing or solid 269 displayed in the operator panel display.
The DIAGNOSTIC OPERATING INSTRUCTIONS screen is displayed.
9. If the system stops with a c31 in the operator panel display, follow the instructions on the
display to select your console.
Is a flashing or solid 269 displayed in the operator panel display?
NO
YES
If the DIAGNOSTIC OPERATING INSTRUCTIONS screen is displayed, the
system is working correctly. It means that one of the SCSI adapters you
removed was defective.
Reinstall the SCSI adapters one by one until you find the defective one.
Go to "Map 0410: Repair Checkout" in the Diagnostic Information For Micro
Channel Bus Systems .
If you have a different symptom go to Step 1 and follow the procedure for
the new symptom.
Go to Step 13.
Maintenance Analysis Procedures (MAPs)
3-1540-19
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