Lenovo System x3550 M4 Installation And Service Manual page 136

• If the check log LED is lit, it indicates that information about an un-isolated fault condition in the
server is available in the IMM event log or in the system-event log.
• If the system-error LED is lit, it indicates that an error has occurred; go to 2 on page 122.
The following illustration shows the operator information panel.
Figure 85. Operator information panel
2. To view the light path diagnostics panel, press the blue release latch on the operator information panel.
Pull forward on the panel until the hinge of the operator information panel is free of the server chassis.
Then pull down on the panel so that you can view the light path diagnostics panel information. This
reveals the light path diagnostics panel. Lit LEDs on this panel indicate the type of error that has
occurred.
Figure 86. Light path diagnostics panel disengagement
The following illustration shows the light path diagnostics panel.
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System x3550 M4 Installation and Service Guide