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Light Path Diagnostics panel
The following illustration shows the error LEDs on the Light Path Diagnostics
panel.
To access the Light Path Diagnostics panel, remove the top cover.
For more information about the Light Path Diagnostics feature, see the Hardware
Maintenance Manual and Troubleshooting Guide on the IBM xSeries Documentation
CD.
To acknowledge a system error but not take immediate action, press the Remind
button and place the Light Path Diagnostics feature in Remind mode. The
system-error LED on the front of the server flashes in Remind mode. If a new
failure occurs, the system-error LED is lit again.
The following table describes the LEDs on the Light Path Diagnostics panel.
Table 2. Diagnostics panel LEDs
Diagnostic panel LED
POWER SUPPLY 1
POWER SUPPLY 2
VRM
CPU
NON REDUNDANT
MEMORY
OVER SPEC
DASD
NMI
PCI BUS A
ISMP
PCI BUS B
FAN
CPU/VRM MISMATCH
PCI BUS C
TEMP
10
IBM xSeries 345 Type 8670: Option Installation Guide
Light Path
1
Diagnostics™
POWER
SUPPLIES
2
VRM
CPU
NON
MEMORY
REDUNDANT
OVER SPEC
DASD
NMI
A
PCI
ISMP
B
BUS
CPU/VRM
C
MISMATCH
Description
The power supply in bay 1 failed.
The power supply in bay 2 failed.
An error occurred on one or both microprocessor voltage regulator modules (VRMs).
One or both microprocessors failed, or one is seated in the wrong socket.
The server power supplies are no longer redundant (applicable only with redundant
power).
One or more dual inline memory modules (DIMMs) failed.
The system has shut down due to a system over load condition.
The SCSI backplane or a device connected to a SCSI bus failed.
A nonmaskable interrupt occurred.
An error occurred on an adapter in PCI-X slots 1 or 2 or on one of the integrated PCI
devices.
The integrated system management processor detected an internal error.
An error occurred on an adapter in PCI-X slots 3 or 4.
A fan (1, 2, 3, 4, 5, 6, 7, or 8) failed or is operating slowly.
The service processor detected a CPU or VRM mismatch.
An error occurred on an adapter in PCI slot 5.
The system temperature exceeded the maximum rating.
REMIND
FAN
TEMP
™
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