50 Troubleshooting
Is a connected port’s Expansion Port Status LED off?
Is a connected port’s Network port link status LED off?
Is the power supply’s AC Power Good LED off?
Is the drive enclosure back panel OK LED off?
Answer Possible Reasons Actions
No System functioning properly. No action required.
Yes The link is down. • Check cable connections and reseat if necessary.
• Inspect cable for damage.
• Swap cables to determine if fault is caused by a
defective cable. Replace cable if necessary.
• In SMU, review event logs for indicators of a specific
fault in a host data path component.
• Contact an authorized service provider for assistance.
• See Isolating a controller module expansion port
connection fault on page 54
Answer Possible Reasons Actions
No System functioning properly. No action required.
Yes The link is down. Use standard networking troubleshooting procedures to
isolate faults on the network.
Answer Possible Reasons Actions
No System functioning properly. No action required.
Yes The power supply is not
receiving adequate power.
• Verify that the power cord is properly connected and
check the power source it is connected to.
• Check that the power supply FRU is firmly locked into
position.
• Check the event log for specific information regarding
the fault.
• Isolate the fault.
• Contact an authorized service provider for assistance.
Answer Possible Reasons Actions
No System functioning properly. No action required.
Yes The power supply unit or a fan
is operating at an
unacceptable voltage/RPM
level, or has failed.
When isolating faults in the power supply, remember that
the fans in both modules receive power through a
common bus on the midplane, so if a power supply unit
fails, the fans continue to operate normally.
• Check that the power supply FRU is firmly locked into
position.
• Check that the AC cord is connected to a power
source.
• Check that the AC cord is connected to the power
supply.
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