Lenovo System x3500 M4, Installation And Service Manual

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light path diagnostics panel, then on the failed component. By viewing the LEDs in a particular order, you
can often identify the source of the error.
When LEDs are lit to indicate an error, they remain lit when the server is turned off, provided that the server is
still connected to power and the power supply is operating correctly.
Before you work inside the server to view light path diagnostics LEDs, read the safety information “Safety”
on page v and “Handling static-sensitive devices” on page 37.
If an error occurs, view the light path diagnostics LEDs in the following order:
1. Look at the operator information panel on the front of the server.
• If the check log LED is lit, it indicates that an error or multiple errors have occurred. The sources of
the errors cannot be isolated or concluded by observing the light path diagnostics LEDs directly. A
further investigation into IMM2 system-event log or system-error log might be required.
• If the system-error LED is lit, it indicates that an error has occurred; go to step 2.
The following illustration shows the operator information panel.
System error LED
Check log LED
System locator LED
Power-on LED Ethernet activity LED
Figure 89. Operator information panel
The following table describes the LEDs on the operator information panel and suggested actions to
correct the detected problems.
• Follow the suggested actions in the order in which they are listed in the Action column until the
problem is solved.
• If an action step is preceded by '(Trained technician only)', that step must be performed only by
a Trained technician.
• Go to the IBM support website at http://www.lenovo.com/support to check for technical information,
hints, tips, and new device drivers or to submit a request for information.
Table 10. The suggested actions to correct the detected problem for each LED light
LED Description Action
System locator (blue)
Use this LED to visually located the server
among other servers. You can use IBM
Systems Director or IMM2 to light this
LED remotely.
Check log (yellow) An error has occurred and cannot be
isolated without performing certain
procedures. a. Check the IMM2 system event log and
the system-error log for information
about the error.
b. Save the log if necessary and clear
the log afterwards.
System-error (yellow) An error has occurred. a. Check the light path diagnostics LEDs
and follow the instructions.
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System x3500 M4 Installation and Service Guide