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
v NMI button: Press this button to force a nonmaskable interrupt to the
v Checkpoint code display: This display provides a checkpoint code that indicates
v Reset button: Press this button to reset the server and run the power-on self-test
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System x3690 X5 Types 7147, 7148, 7149, and 7192: Installation and User's Guide
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.
microprocessor. You might have to use a pen or the end of a straightened paper
clip to press the button. You can also use it to force a blue screen memory
dump. Use this button only when you are directed to do so by the IBM service
support.
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.
(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.