Compaq Service Reference Guide J-3
Memory
Error
Code Description Recommended Action
0200-xx Machine ID test failed. Reinsert memory modules and retest.
0202-xx System ROM checksum failed The following steps apply to 0202-xx through 0215-xx:
0203-xx Write/read test failed. 1. Remove one memory module at a time until the error
message stops.
0204-xx Address test failed. 2. Replace other removed modules one at a time, testing
each to ensure the error does not return.
0205-xxx Walking 1s test failed. 3. Replace defective modules.
0209-xxx RAM long test failed. 4. If error continues, replace system board and retest.
0211-xx Random pattern test failed.
0212-xxx Cache test failed.
0214-xx Noise test failed. The following steps apply to 0214-xx through 0215-xx:
0215-xx Random address test failed. 1. Remove one memory module at a time until the error
message stops.
2. Replace other removed modules one at a time, testing
each to ensure the error does not return.
3. Replace the system board and retest.
Keyboard
Error
Code Description Recommended Action
0300-xx ID test failed The following steps apply 0300-xx through 0304-xx:
0301-xx Self-test/interface test failed. 1. Check the keyboard connection. If disconnected, turn
the computer off and connect the keyboard.
0302-xx Individual key test failed. 2. Replace the keyboard and retest.
0304-xx Repeat test failed. 3. Replace the system board and retest.
✎
Holding any key down during the boot-up sequence causes the Basic Input Output
System (BIOS) to beep, as a warning of possible keyboard problems. 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 key, the keyboard is
functioning properly.
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