Diagnostic Tools
4-35
Compaq Confidential – Need to Know Required
Writer: Bruce Sullivan Project: Compaq Deskpro Workstation AP250 Maintenance and Service Guide Comments:
Part Number: 118133-001 File Name: e-ch4 Diagnostic Tools.doc Last Saved On: 10/26/99 3:09 PM
Keyboard
Do not hold down a key during the boot-up sequence. Holding down any key
during the boot-up sequence causes the Basic Input Output System (BIOS) to
beep as a warning of possible keyboard problems. To test the keyboard, wait
until after the system has booted, then press the Num Lock key. If the Num
Lock light on the keyboard toggles on and off with each press of the Num
Lock key, then the keyboard is functioning properly.
Table 4-14
Keyboard Test Error Codes
Error Code
Description
Recommended Action
300-xx
Keyboard ID test failed.
The following steps apply to error
codes 300-xx through 304-xx:
301-xx
Keyboard self-test/interface test
failed.
1.
Check the keyboard
connection. If disconnected,
turn the computer off and
connect the keyboard.
302-xx
Individual key test failed.
2.
Replace the keyboard and
retest.
304-xx
Keyboard repeat test failed.
3.
Replace the system board
and retest.
Printer
Table 4-15
Parallel Printer Test Error Codes
Error Code
Description
Recommended Action
401-xx
Printer failed or is not connected.
The following steps apply to
401-xx through 403-xx:
402-xx
Printer port test failed.
1.
Connect the printer
403-xx
Printer pattern test failed.
2.
Check power to the printer.
3.
Install the loop-back
connector and retest.
4.
Replace system board and
retest.
