Diagnostics Panel; System Environmental Monitor Subsystem Led; Light Path Diagnostics Table - IBM eServer 342 xSeries User Reference Manual

Diagnostics panel

The following illustration shows the LEDs on the diagnostics panel on the system
board.

System environmental monitor subsystem LED

The xSeries 342 server has a system management feature on the system board. This
green system management LED flashes, indicating that the system temperature, fan
speeds, voltage ranges, power supplies, power backplane and DASD backplane are
being monitored. If an error occurs in any of these areas, the system environmental
monitor subsystem turns on the respective error LED on the Light Path Diagnostics
panel. If the LED remains on or off, an error has occurred.

Light Path Diagnostics table

The system error LED on the operator information panel is lit when certain system
errors occur. If the system error LED on your server is lit, use the following table to
help determine the cause of the error and the action you should take.
Lit LED on
diagnostics
panel
PS1 Power supply 1 has failed.
PS2 Power supply 2 has failed.
PS3 Reserved
NON Power supply redundancy has been lost.
Note: This LED will not be lit if your server
has only one power supply; however,
the power is not redundant with only
one power supply installed.
OVER The system has exceeded the power
capabilities of the installed power supply.
NMI A nonmaskable interrupt occurred.
Table 16. Light Path Diagnostics.
104
IBM xSeries 342: User's Reference
MEM PS1
CPU PS2
PCI A PS3
PCI B NON
PCI C OVER
VRM NMI
DASD TEMP
SP FAN
REMIND
Cause Action
Replace power supply 1.
Replace power supply 2.
Check the PS1 and PS2 LEDs and replace the
indicated power supply. If neither LED is lit, you can
remove optional devices from the server to restore
power supply redundancy.
Remove optional devices from the server to reduce
the power requirements.
1. If the PCI A, PCI B, or PCI C LED is on, follow the
instructions for that LED.
2. If none of the PCI LEDs are on, restart the server.
If the problem persists, have the system serviced.