IBM Types 2193, Hardware Maintenance Manual

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55
Start
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 type 2193,
2194, 2196, 2197, 6344 and 6345. 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 59 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
data and programs of 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.