Index Of Symptoms, Messages, Error Codes, Or Beeps - IBM 2193 Maintenance Service Manual

Index of Symptoms, Messages, Error Codes, or Beeps

How to Use Error Messages: Use the messages, error codes,
and beeps combinations that occur to diagnose failures. If more
than one failure occurs, diagnose from the first failure that
appears. The cause of the first failure can result in false
messages, error codes, or beeps. If you did not receive any
messages, error codes, or beeps, see if the symptom is listed in
Table 2-3, "Error Symptoms List" on page 76.
ATTENTION: When you have replaced a FRU, you must run
the diagnostics to ensure that no other activity
has been affected by the change. This system
check can be done through the diagnostics
program (Select Diagnostics, then select and
execute All Tests from PC-Doctor).
POST: Some diagnostic aids are resident in the machine, such
as the Power-On Self Test (POST). The machine performs the
POST each time it is powered on. Use this information
throughout the diagnostic procedures. The POST is a series of
system checks and initializations that verify the correct
operation of the base system.
After a successful POST, the system attempts to load operating
system. The system can be customized for different startup
(boot) methods by the BIOS Setup Utility. See "Advanced
Setup" on page 52.
The system's default startup sequence automatically looks for
the operating system files in the hard disk if these files are not
found in the diskette.
NOTE: Remember that POST does not test all areas, but
only those that allow the system to operate well
enough to run the diagnostics program.
Table 2-1 lists BIOS error codes, messages, and beeps to their
possible causes, table 2-3 lists error symptoms and their
possible causes. The most likely cause is listed first. Make sure
you complete all items in the cause or "Action/FRU" column.
When servicing a system, always begin with "Start" on page 64.
If the problem cannot be corrected using these two index tables,
go to "Undetermined Problems" on page 101.
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