4-19
Compaq Professional Workstation AP400 Maintenance and Service Guide
3.
Disconnect any peripheral devices other than the monitor and keyboard. Do not
disconnect the printer if you want to test it or use it to log error messages.
4.
Delete the Power-on Password, if set.
5.
If a key icon (
) appears on the screen when POST completes, the Power-on Password
is set. If this occurs, you must enter the password to continue. To delete the password,
type the current password, then press Enter. If you do not have access to the password,
you must disable it through the SW1-S2 switch on the system board with tray.
6.
Install loop-back and terminating plugs for complete testing.
7.
Run the Diagnostics diskette.
Memory
Table 4-12
Memory Test Error Codes
Error Code
Description
Recommended Action
200-xx
Memory machine ID test failed.
Reinsert DIMM in correct location.
202-xx
Memory system ROM checksum failed.
The following steps apply to error codes 202-xx
through 215-xx:
203-xx
Memory write/read test failed.
1. Remove one pair of DIMM at a time until the error
message stops.
204-xx
Memory address test failed.
2. Replace other removed DIMMs one pair at a time, testing
each to ensure the error does not return.
211-xx
Random pattern test failed.
3. Replace the system board with tray and retest.
214-xx
Noise test failed.
215-xx
Random address test failed.
Keyboard
Table 4-13
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 with tray and retest.
