NMI LED lights up

The NMI LED on the light path diagnostics panel lights up when a nonmaskable interruption occurs, or you press the NMI button.

Troubleshooting steps

If you have a monitor, check the system event log for information about the error.
Shut down the server and remove the power cord.
Check that all plug-in cards and devices are firmly installed.
Turn on the server.
If the server does not boot, replace the server.