Component identification 13
NMI functionality
An NMI crash dump enables administrators to create crash dump files when a system is hung and not
responding to traditional debug mechanisms.
Crash dump log analysis is an essential part of diagnosing reliability problems, such as hangs in
operating systems, device drivers, and applications. Many crashes freeze a system, and the only
available action for administrators is to cycle the system power. Resetting the system erases any
information that could support problem analysis, but the NMI feature preserves that information by
performing a memory dump before a hard reset.
To force the OS to invoke the NMI handler and generate a crash dump log, the administrator can do any
of the following:
• Short the NMI jumper pins
• Press the NMI switch
• Use the iLO Virtual NMI feature
For additional information, see the whitepaper on the HP website
(http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00797875/c00797875.pdf
).
System board LEDs
Item LED description Status
1 Processor failure Amber = Processor has failed.
Off = Normal
2 Fan 6 failure Amber = Fan has failed or is missing.
Off = Normal
3 Power supply Off = No AC power or failed power supply
Green = Power supply is on and is
functioning.
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