IBM NetVista, Hardware Maintenance Manual

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This is the entry point for all check procedures. The check procedures use failure symptoms, Power-On Self Test (POST)
error codes, or beeps to help determine the defective field replaceable unit (FRU). Follow the suggested check procedures or
use the diagnostics diskette to determine the problem FRU.
IMPORTANT:
Replace FRUs ONLY when it is determined that the error is not a result of software, loose contacts, or dirty
component surfaces. Any FRU change should be verified by running a complete test (
Diagnostics - All Tests
in
PC-Doctor diagnostics program).
This book comes with a diagnostic program diskette. This diskette should be used ONLY with
Machine Types 2255 and
2275
. Do not use this diskette on other models.
POST error codes and error messages are displayed on the screen after the IBM logo. A beep will precede each error code
or message. Please refer to “Index of Symptoms, Messages, Error Codes, or Beeps” on page 60 for additional help.
All voltages in the check procedures are positive unless otherwise indicated. Use frame ground for all voltage checks unless
otherwise specified.
IMPORTANT:
There is a voltage selector on the rear panel of the machine. Use a flat-head screwdriver to turn the voltage
selector to the voltage setting for the area in which you will be using the system.
NOTE:
If the check procedures instruct you to replace a FRU and the error message persists, an option adapter card
might be causing the failure. Remove all option adapter cards, one at a time, until the error changes or the problem
is no longer apparent. The problem may be in the last card that you removed or something associated with it.
The Recovery CD contains pre-loaded software that may reinstall the original software and recover the system. Ensure that
data and programs on the hard drive have a backup copy.
How to Diagnose Combined FRUs:
If an adapter or device consists of more than one FRU, any of the FRUs might cause
an error code. Before replacing the device or adapter, remove the FRUs one by one to see if the symptoms change.