Digital Equipment DECstation 5000/100 Series, Maintenance Manual

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Table 4-1. Troubleshooting Procedure for Each LED Error Code
LED Error Code
(1=0n) Troubleshooting Procedure
1111 1111
0011 1111
0011 1110
0011 1101
See Figure 4-2 to troubleshoot.
0011 0111 Replace the CPU module. If the power-up self-test still stops and
the LEDs display 0011 0111, replace the system module. Refer to
Chapter 5 for directions.
0011 0110 See Figure 4-3 to troubleshoot.
0011 1011
0010 1011
0001 1011
0000 1011
See ‘‘To Troubleshoot When the Diagnostic LED Display is 0011
1011, 0010 1011, 0001 1011, or 0000 1011’’ section to troubleshoot.
0010 0011
0001 0011
0000 0011
0000 0000
See Figure 4-4 to troubleshoot.
Identifying Failed FRUs 4–5