Digital Equipment DEC 3000 600 AXP, Service Information

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LED Codes
If the system enters console mode, then run the NVR diagnostics
and interpret the error information using:
• SHOW ERROR command
• Diagnostic information (Chapter 9)
• Diagnostic error messages (Chapter 14)
If the system does not enter console mode (>>>), or if the hex
code DD is not displayed on the LEDs, then use Table 10–3 to
isolate the failed FRU. Take the following action in the order
listed.
1. Verify that there is a secure connection between the I/O
module and the system module.
2. Replace the NVR.
3. Verify that all memory modules are properly installed.
Reseat the MMBs and SIMMs if necessary.
4. Verify that all power cables are connected correctly.
This portion of the testing is not displayed on the monitor.
Table 10–3 NVR LED Error Codes
LED Codes
3A 3B 3C
3D 3E
SCC LED
Codes The following LED codes represent continued power-up testing.
If an error occurs during this testing sequence, a hexadecimal
code plus FRU and error code information appear on the screen.
If the system enters console mode, then run the SCC diagnostics
and interpret the error information using:
• SHOW ERROR command
• Diagnostic information (Chapter 9)
• Diagnostic error messages (Chapter 14)
10–6