IBM 79463AU Installation And User Manual page 33

Operator information
panel
Light path
diagnostics LEDs
The following illustration shows the LEDs and controls on the light path diagnostics
panel.
v Remind button: This button places the system-error LED on the front panel into
Remind mode. In Remind mode, the system-error LED flashes once every 2
seconds until the problem is corrected, the server is restarted, or a new problem
occurs.
By placing the system-error LED indicator in Remind mode, you acknowledge
that you are aware of the last failure but will not take immediate action to correct
the problem. The remind function is controlled by the IMM.
v NMI button: Press this button to force a nonmaskable interrupt to the
microprocessor. You might have to use a pen or the end of a straightened paper
clip to press the button. It allows you to blue screen the server and take a
memory dump (use this button only when directed by the IBM service support).
v Checkpoint code display: This display provides a checkpoint code that
indicates the point at which the system stopped during the boot block and POST.
A checkpoint code is either a byte or a word value that is produced by UEFI. The
display does not provide error codes or suggest components to be replaced.
v Reset button: Press this button to reset the server and run the power-on
self-test (POST). You might have to use a pen or the end of a straightened paper
clip to press the button. The Reset button is in the lower-right corner of the light
path diagnostics panel.
Release latch
Chapter 1. The System x3550 M2 server
17