Light Path Diagnostics panel
The Light Path Diagnostics LEDs are described in the following table.
MEM
CPU
PCI A
PCI B
PCI C
VRM
DASD
SP
PS1
PS2
PS3
NON
OVER
NMI
TEMP
FAN
REMIND
LED
Description
MEM
A memory failure occurred. This LED is turned on when any of the Light Path LEDs located near
the memory (DIMM) are turned on by the integrated system management processor.
CPU
A CPU failure occurred. This LED is turned on when either of the two Light Path LEDs located
near the appropriate CPU socket is turned on by the integrated system management processor.
PCI A
Error occurred on an adapter in PCI slot 1 or on one of the PCI devices integrated on the system
board.
PCI B
Error occurred on an adapter in PCI slot 2 or 3 or on one of the PCI devices integrated on the
system board.
PCI C
Error occurred on an adapter in PCI slot 4 or 5 or on one of the PCI devices integrated on the
system board.
VRM
A VRM failure occurred. This LED is turned on by the hardware when either of the two Light Path
LEDs located near the appropriate VRM is turned on by the integrated system management
processor.
DASD
System board or SCSI hot-swap hard disk drive failure, hard disk drive removed from either
standard or optional expansion hot-swap bay DASD backplane, or hard disk drive temperature
has exceeded maximum limit (in this case, the TEMP and System error LEDs will be lit).
SP
An error has been detected in the integrated system management processor.
PS1
Power supply 1 failure or removed.
PS2
Power supply 2 failure or removed (only active when 2nd power supply is installed).
PS3
Not used.
NON-RED
Server power supplies are no longer redundant with two power supplies installed.
OVERSPEC
The system has approached 95% of the power capabilities of the installed power-supply units.
NMI
Nonmaskable interrupt occurred.
TEMP
System temperature exceeded maximum limit. Other LEDs will be on to identify the area of over
temperature (such as CPUx, CPU, DASD LEDs).
FAN
Fan failure, or fan is operating slowly or has been removed. This LED is turned on when any of
the Light Path LEDs mounted directly on the fan assemblies or near the CPU sockets are turned
on by the integrated system management processor.
Remind Button
Installing options
39
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