Troubleshooting
Troubleshooting Using LED Indicators
Chapter 4
55
Red Red Green Off Flashing
Yellow
CPU 0 temperature warning. Check for
blockages. Investigate the problem at the first
opportunity.
Red Red Red Red Flashing
Yellow
Undefined error condition (warning only). Check
the SEL for information.
Off Off Green Red Flashing
Red
Fan 3 failure. BMC is reporting that both fan
rotors are turning more slowly that expected (or
stopped). Replace the fan, fan control board, or
system board.
Off Green Off Red Flashing
Red
Fan 2 failure. BMC is reporting that both fan
rotors are turning more slowly that expected (or
stopped). Replace the fan, fan control board, or
system board.
Off Green Green Red Flashing
Red
Fan 5 failure. BMC is reporting that both fan
rotors are turning more slowly that expected (or
stopped). Replace the fan, fan control board, or
system board.
Off Green Red Off Flashing
Red
VRM overvoltage fault. Replace the system
board.
Off Red Off Off Flashing
Red
System firmware error. Power down the server,
wait 20 seconds and resume operation. If the
problem continues, replace the system board.
Off Red Off Red Flashing
Red
VRM power pod fault. Replace the system
board.
Off Red Green Red Flashing
Red
Power supply 2 fault. Replace power supply 2,
the power supply interface board, or the system
board.
Green Off Off Red Flashing
Red
Fan 1 failure. BMC is reporting that both fan
rotors are turning more slowly that expected (or
stopped). Replace the fan, fan control board, or
system board.
Green Off Green Red Flashing
Red
CPU 1 turbofan failure. Replace CPU 1, the
CPU power module, or the system board.
Green Off Red Off Flashing
Red
VRM undervoltage fault. Replace the system
board.
Table 4-3 Diagnostic LED Displays and Meanings (Continued)
Diag 1
LED
Diag 2
LED
Diag 3
LED
Diag 4
LED
System
LED
Description
