IBM System x3550 M3 Type 4254 Installation And User Manual page 32

Note: The system service label on the underside of the cover also provides
To access the light path diagnostics panel, slide the blue release button on the
operator information panel to the left. Pull forward on the unit until the hinge of the
operator panel is free of the server chassis. Then pull down on the unit, so that you
can view the light path diagnostics panel information.
Note: When you slide the light path diagnostics panel out of the server to check
Operator information
panel
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
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IBM System x3550 M3 Types 4254 and 7944: Installation and User's Guide
information about the location of the light path diagnostics LEDs.
the LEDs or checkpoint codes, do not run the server continuously with light
path diagnostics panel outside of the server. The panel should only be
outside of the server a short time. The light path diagnostics panel must
remain in the server when the server is running to ensure proper cooling.
Light path
diagnostics LEDs
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.
microprocessor. You might have to use a pen or the end of a straightened paper
Release latch