IBM eServer xSeries 455 Type 8855 Hardware Maintenance Manual And Troubleshooting Manual page 170

Level 2 Light Path LED
MEM LED on (memory error)
DASD LED on (hot-swap hard
drive failure)
Note: If RAID system, refer to the
Hardware Maintenance Manual for
the specific RAID adapter.
PCI-X BUS LED on (adapter
failure)
FAN LED on (fan failure)
Note: A failing fan can also cause
the TEMP and DASD LEDs to be
on.
TEMP LED on (temperature too
high)
NMI (nonmaskable interrupt)
Note: A PCI or MEM LED may
also be on.
Board LED on (system monitor
detected an error on one of the six
system boards (see system board
LEDs 1-6 for additional location
information)
Event Log
PS1 LED on
PS2 LED on
160
IBM xSeries 455 Type 8855: Hardware Maintenance Manual and Troubleshooting Guide
FRU/action
1. Check DIMM error LED on memory board.
Note: If there is a DIMM failure, an LED on the memory board indicates the
failing DIMM. Reseat the failing DIMMs, re-enable the DIMMs using the
Configuration/Setup Utility program, and run AMIDiag to pinpoint the failing
DIMM.
2. DIMM.
3. Memory board.
1. Run the AMIDiag program.
2. Failing drive (reseat/replace).
3. Be sure the fans are operating correctly and the air flow is good.
4. SCSI backplane.
1. Check the system-error log.
2. If there is a PCI-X slot available, move the adapter to an empty PCI-X slot,
and restart the server.
3. Failing adapter.
4. PCI-X board.
1. Check individual fan LEDs.
2. Replace respective fan.
3. Front fan connectors.
4. I/O board.
1. If a fan LED is on, replace the fan.
2. Ambient temperature must be within normal operating specifications. See
"Features and specifications" on page 3.
3. Examine the system-error log.
a. System over recommended temperature
b. Operator information panel
c. DASD over recommended temperature — overheating hard disk drive.
d. System over temperature for processor x (where x is processor number)
— microprocessor x.
e. VRM LED on — failing VRM.
f. Power supply fault / over temp — failing power supply
1. See the system-error log.
2. If a PCI LED is on, follow the instructions for that LED.
3. If a MEM LED is on, follow the instructions for that LED.
4. Restart the server.
1. Turn off the server and disconnect the ac power cord.
2. Wait at least 10 seconds before plugging in the ac power cord again, and
restart the server.
3. Failed system board.
See the system-error log.
1. Power supply 1
2. Top power board
3. Midplane board
1. Power supply 2
2. Top power board
3. Midplane board