Troubleshooting

POST diagnostic messages

To use the Power On Self Test (POST) messages (during a reboot) to diagnose remote hardware problems:

1.At the ok prompt, enter: boot

2.Scan the displayed messages on the screen. Watch for error messages.

You can identify problems more accurately if you are familiar with the system power-on initialization messages. These messages show you the types of functions the system performs at various stages of system start-up. These messages can also show the transfer of control from OpenBoot firmware to POST.

Memory failure

The operating system, diagnostic program, or POST may not display a DIMM location (U number) as part of a memory error message. In this situation, the only available information is a physical memory address and failing byte. The following table lists physical memory addresses to locate a defective DIMM.

DIMM slot

DIMM pair

 

(non-interleave)

 

 

 

 

DIMM(0)

00000000 - 0fffffff

 

 

DIMM1

 

 

 

DIMM2

10000000 - 1fffffff

 

 

DIMM3

 

 

 

172 Avaya CMS Sun Ultra 5 Computer Hardware Installation, Maintenance, and Troubleshooting

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Avaya 585-215-871 Post diagnostic messages, Memory failure, Dimm slot Dimm pair, 00000000 0fffffff, 10000000 1fffffff

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