Diagnostics and Troubleshooting 3-25
300 – 399, Keyboard Test Error Codes
The 300 series of diagnostic error codes identifies failures with keyboard and system board
functions. Corrective action may require replacement of the keyboard or the system
board assembly.
Table 3-5
Keyboard Test Error Codes
Error Code Description Recommended Action
301-XX Keyboard short test, 8042 self-test
failed.
302-XX Keyboard long test failed.
303-XX Keyboard LED test, 8042 self-test
failed.
304-XX Keyboard typematic test failed.
1. Check the keyboard connection. If disconnected:
power down the computer, reconnect the
keyboard, power up the system, then retest.
2. Replace the keyboard and retest.
3. Replace the system board and retest.
400 – 499, Parallel Printer Test Error Codes
The 400 series of diagnostic error codes identifies failures with parallel printer interface board
or system board functions. Corrective action may require replacement of the serial/parallel
interface board or the system board assembly.
Table 3-6
Parallel Printer Test Error Codes
Error Code Description Recommended Action
401-XX Printer failed or not connected.
402-XX Printer data register failed.
403-XX Printer pattern test failed.
498-XX Printer failed or not connected.
1. Connect the printer and retest.
2. Check the power to the printer and retest.
3. Install the loopback connector and retest.
4. Check the switch on the serial/parallel interface
board (if applicable) and retest.
5. Replace the serial/parallel interface board
(if applicable) and retest.
6. Replace the system board and retest.
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