Level 2 Light Path Troubleshooting - IBM 8686 - Eserver xSeries 360 Hardware Maintenance Manual

Remind button
You can use the Remind button to place the Fault light on the front panel into the
remind mode (blinks every 2 seconds). By pressing the button, you acknowledge
the failure but indicate that you will not take immediate action. If a new failure
occurs, the Fault light turns on again.
The Fault light stays in Remind mode until one of the following conditions occurs:
v All known problems are resolved
v The system is restarted
v A new problem occurs
You can use the Remind button to delay server maintenance until a later time. In
this way, the light will indicate any subsequent error. If the light is still lit from the
first error, it is unable to indicate subsequent errors.
The Light Path Diagnostics feature might direct you to look for an LED on the
system board that identifies the specific failing component. The following illustration
identifies the LEDs on the system board.
Power backplane
LED (CR34)

Level 2 Light Path troubleshooting

The Level 2 LEDs remain lit if the server shuts down, provided that the power
supplies are operating properly. This feature helps you to isolate the problem if an
error causes the server to shut down. For detailed information about the action to
take when the Level 2 Light Path Diagnostics indicate a problem, see "Level 2 light
path LED errors" on page 118.
If the Level 2 Light Path Diagnostics indicate a problem that does not require
immediate action, you can press the Remind button on the diagnostic LED panel.
PCI attention LED
PCI power LED
XA-32 chipset
VRM LED (CR29)
PCI switch card LED (CR 27)
Remote Supervisor Adapter
cable LED (CR28)
Microprocessor 4
VRM LED (CR20)
Microprocessor 4
LED (CR15)
Microprocessor 1
LED (CR4)
Microprocessor 1
VRM LED (CR2)
Microprocessor 3
LED (CR6)
Microprocessor 3
VRM LED (CR1)
Microprocessor 2
LED (CR8)
Microprocessor 2
VRM LED (CR21)
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Diagnostics