IBM BladeCenter HS20, Installation And User Manual

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Light path diagnostics LEDs
The following table lists the LEDs on the light path diagnostics panel, the problems
that they indicate, and actions to solve the problems. The following illustrations
show the light path diagnostics panel and LEDs on the system board.
MIS
NMI
SBRD
TEMP
NMI error LED
Microprocessor mismatch error LED
System-board error LED
Over temperature error LED
Light path diagnostics LED
Light path diagnostics switch
Light path diagnostics (SW4)
DIMM 1 error LED (CR201)
DIMM 2 error LED (CR4)
Microprocessor 1 error LED (CR12)
Microprocessor 2 error LED (CR13)
Reserved
Control panel
connector
3V lithium battery
SAS 0 Hard disk drive LED (CR260)
SAS trays/connectors
SAS 1 hard
disk drive LED
(CR262)
I/O expansion
connectors
DIMM 4 Error LED
(CR6)
DIMM 3 Error LED
(CR5)
Power is available to relight the light path diagnostics LEDs for a small period of
time after the blade server is removed from the BladeCenter unit. During that period
of time, you can relight the light path diagnostics LEDs for a maximum of 25
seconds (or less, depending on the number of LEDs that are lit and the length of
time the blade server is removed from the BladeCenter unit) by pressing the light
path diagnostics button. The light path diagnostics power present LED (CR111) is lit
when the light path diagnostics button is pressed if power is available to relight the
blade-error LEDs. If the light path diagnostics power present LED is not lit when the
light path diagnostics button is pressed, no power is available to light the
blade-error LEDs, and they will be unable to provide any diagnostic information.
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BladeCenter HS20 Type 7981: Installation and User’s Guide