Service Reference Guide

Service Reference Guide E–3
Diagnostic Error Codes
✎
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.
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
0212-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.