Compaq 486 Maintenance And Service Manual page 21

Diagnostic error codes occur if the system recognizes a problem while running
the Diagnostics program (refer to the SUPPORT SOFTWARE MAINTENANCE AND
SERVICE GUIDE for additional information on running the Diagnostics
software). These error codes help identify possible defective subassemblies.
Tables 3-2 through 3-12 list possible error codes, a description of the error
condition, and the action required to resolve the error condition.
In each case, the Recommended Action column lists steps necessary to correct
the problem. After completing each step, run the Diagnostics program to
verify whether the error condition has been corrected.
reappears, perform the next step, then run the Diagnostics program again.
Follow this procedure until the Diagnostics program no longer detects an
error condition.
The error codes appear in an AYY XX or AAYY XX format.
A or AA = number that represents faulty assembly
YY = test or action that failed
XX = a specific problem
Example: Error code 610-21 shows that the diskette drive failed to get change
line status.
For assistance in the removal and replacement of a particular subassembly,
see Chapter 5, "Removal and Replacement Procedures."
Table 3-2. Processor Test Error Codes
=============================================================================
Error
Code Description
-----------------------------------------------------------------------------
101 - 01 16 bit CPU failed
101 - 02 32 bit CPU failed
101 - 50 BIOS dispatch of processor
101 - 51 Processor is unavailable
or non existent
101 - 52 Time out waiting for
completion of test
101 - 53 Failure to terminate processor
101 - 54 Time out waiting for serial
semaphore
101 - 56 Unexpected interrupt occurred
during test
101 - 91 16 bit multiplication, expected
101 - 92 32 bit multiplication expected
101 - 93 16 bit multiplication
unexpected
101 - 94 32 bit multiplication
If the error code
Recommended
Action
Replace the processor board
and retest for error codes
101 - xx.