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Table 5-1 Troubleshooting FRUs
Potential FRUsTroubleshooting StepsNormal Functioning
Indicators
Problem
Indicators
Problem or
Symptom
No AC present
Power Supply
Power Distribution
System board
Display board
1. AC must be present. Check that
PDU is plugged in.
2. Ensure there is a working
power supply. The LED on the
supply should be lit.
3. Check for an EFI shell prompt
(CTRL B) at console).
Power LED Off.
Power LED on iLO
MP card (if
installed) should be
lit solid green.
Standby LED on
system board is on
steady.
BMC “heartbeat”
LED on system
board is flashing.(if
installed) should be
lit solid green.
Standby LED is
off when AC is
plugged into
server. BMC
“heartbeat” not
flashing. Both
LEDs are
located on the
system board,
see System
Board LEDs
later in chapter.
No indication of
housekeeping
voltage present
when AC is
connected and
power switch is
in the off
position.
Missing FRU
Power Supply
CPU power pod
System board
Intrusion switch on
chassis (cover not
completely closed)
1. Ensure there is a working
power supply. The LED on the
supply should be lit.
2. Verify that standby voltage is
present. Check that the STBY
LED on the system board is lit.
3. Verify that the baseboard
management controller is
functioning. Check the
heartbeat (BMC) LED on the
system board is lit.
4. Check server event log (SEL).
Look for event log detail = Low
Voltage DC power. This
indicates a failure of one of the
CPU power pods.
Power switch on.
Power LED on
steady green.
System LED is off.
Display panel
Power LED
stays off when
power is turned
on.
System LED
might be
flashing yellow
(Attention
indication).
System does not
power on when
display panel
Power switch is
turned on.
Processors
Processor Support
Modules
Memory
System board
Console
1. Check that the console is
properly connected and can
communicate with the BMC.
Press (CTRL B) to access the iLO
MP login prompt.
2. Check SEL.
Look for entries related to:
• Processors
• Processor Support Modules
(Also known as power pods).
• Memory
3. Check for red LED on the iLO
MP card if installed. If red, the
problem is with the iLO MP.
4. Reduce to minimum
configuration and troubleshoot
from there.
Display panel
power LED is
steady green.
System events are
being displayed at
the console.
EFI Main Menu
prompt.
Display panel
power LED is
not steady
green.
No server
events are being
displayed at the
console.
There is no EFI
Main Menu
prompt at the
console.
No EFI Main
Menu prompt.
Corrupt operating
system
Hard Drive
Disk drive cage
backplane
SCSI interface on
system board
Processor
1. Check console messages. Did
server hang?
2. Check SELs for possible
problem indication.
3. Run ODE diagnostics.
Operating system
prompt.
Operating system
boot messages.
System LED on
steady green.
Boot error
messages.
System LED
flashing.
Cannot boot to
operating
system.
98 Troubleshooting