Light Path Diagnostics Panel; Leds - IBM eServer xSeries 255 Option Installation Manual

Light Path Diagnostics panel

The following illustration shows the location of the error LEDs and the Remind
button on the Light Path Diagnostics panel. To access the Light Path Diagnostics
panel, you must remove the top cover.
Notes:
1. The Light Path Diagnostics panel is also called the LED card or diagnostics
2. See the Hardware Maintenance Manual and Troubleshooting Guide on the IBM

LEDs

The Light Path Diagnostics panel LEDs are described in the following table.
Table 2. Light Path Diagnostics panel LEDs
Light Path Description
Diagnostics panel
LED
NMI Nonmaskable interrupt occurred (for service personnel only).
ISMP Integrated system management processor (ISMP) failure.
LOG See the System Error Log in the Configuration/Setup Utility program, or the error log is full.
PCIA Error occurred on an adapter in PCI bus A (slot 1) or integrated SCSI or video controller on
the system board.
PCIB Error occurred on an adapter in PCI bus B (slots 2 and 3) or integrated Ethernet controller
on the system board.
PCIC Error occurred on an adapter in PCI bus C (slots 4 and 5) on the system board.
PCID Error occurred on an adapter in PCI bus D (slots 6 and 7) on the system board.
DASD A SCSI backplane or a device connected to a SCSI bus failed.
This LED also illuminates if there is a DASD failure in the SCSI controller.
PS1 The power supply in bay 1 failed.
PS2 The power supply in bay 2 failed.
CPU One or more microprocessors failed, a microprocessor has been installed in the incorrect
order, or the wrong type of microprocessor has been installed in a socket.
VRM Error on microprocessor voltage regulator module (VRM), on integrated system board VRM,
or on integrated memory board VRM.
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IBM xSeries 255 Type 8685: Option Installation Guide
MEMORY
NMI ISMP LOG D1
PCIA PCIB PCIC PCID DASD D2
PS1 PS2 CPU VRM TEMP D3
PS3 PS4 FAN D4
OVER NON
SPEC REDUND
Light Path
D5
Diagnostics™
D6
REMIND
LED panel.
xSeries Documentation CD for additional information about these LEDs.
D7
D8
D9
D10
D11
D12