IBM 600X (MT 2646) Symptom-to-FRU error messages, How to use error messages, Symptom-to-FRU index

Symptom-to-FRU error messages

Symptom-to-FRU error messages

This chapter describes the Symptom-to-FRU error messages.

How to use error messages

Use the error codes displayed on the screen failures.

If two or more error codes are displayed, b diagnosis with the first one. Whatever caused t error code can cause false error codes to b

If no error code is displayed, see if the listed in the “Symptom-to-FRU index.”

How to diagnose multiple FRUs

When an adapter or a device has more than one error code could be caused by any of them. replacing multiple FRUs, try removing or exchanging FRU, one by one in the specified sequence, t symptoms change.

Symptom-to-FRU index

The	symptom-to-FRU index lists the symptoms	and er
and	their possible causes. The most likely	cause

first.

Note: Do the FRU replacements or other actions sequence shown in the “FRU/Action in Sequenc column. If a FRU replacement does not solve problem, put the original part back in the Do not replace a nondefective FRU.

This index can also help you determine, during r servicing, what FRUs are likely to need to be next.

A numeric		error	code is displayed	for each er
in	POST or	system	operation. In theX	displays,canbe
any	number.

If no numeric codes is presented, use the nar

descriptions					of	symptoms.
If	a	symptom is				not	listed, go to		“Undetermined
on page 31.
	Note
For		an	IBM		device		not	supported	by	diagnostic
in	the			ThinkPad		notebook		computers,	see	the manu
for		that			device.

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