Read This First (9546, 9547)
Read This First
Before you go to the checkout guide,
be sure to read this section.
Important Notes
- Only certified trained personnel
should service the computer.
- Read FRU service procedures before replacing any FRUs.
- Be extremely careful during write operations
such as copying, saving, or formatting.
Drives in the computer that you are servicing
might have been rearranged or the drive startup
sequence might have been altered.
If you select an incorrect drive,
data or programs can be written over.
- Replace FRUs only for the correct model.
When you replace the FRU, make sure the model of the machine
and FRU part number are correct by referring to the part list.
- FRUs should not be replaced because of a single, un-reproducible
failure. Single failures can occur from a variety of reasons
that have nothing to do with a hardware defect such as:
cosmic radiation, electrostatic discharge, or software errors.
FRU replacement should be considered only when
a recurring problem exists.
If this is suspected, clear the error log and run the test again.
Do not replace any FRUs if log errors do not reappear.
- Be careful not to replace a non-defective FRU.
How to Use Error Messages
Use the error codes displayed on the screen to diagnose failures.
If more than one error code is displayed, begin the diagnosis with
the first error code.
The cause of the first error code can result in false error codes being
displayed. If no error code is displayed, see if the error symptom is
listed in the 'Symptom-to-FRU Index'.
Port Replicator Problems
If you suspect a problem with the Port Replicator, see 'Port
Replicator Checkout' in the Common Devices Checkout
section for more information.
How to Diagnose Multiple FRUs
If the adapter or device has more than one FRU, the error code
could be caused by either FRU.
Before replacing multiple FRUs, try removing or
exchanging each FRU,
one by one in the designated sequence, to see if the symptoms change.
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