Light Path Diagnostics; Error Leds - Lenovo x3250 m6 Installation And Service Manual

• If an action step is preceded by '(Trained technician only)', that step must be performed only by a trained
technician.
• Go to the Lenovo support Web site at http://www.lenovo.com/support to check for technical information,
hints, tips, and new device drivers or to submit a request for information.

Light path diagnostics

Light path diagnostics is a system of LEDs on various external and internal components of the server that
leads you to the failed component. When an error occurs, LEDs are lit along the path of the front panel, the
operator information 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, if 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 88.
If an error occurs, view the light path diagnostics LEDs and look at the operator information panel on
the front of the server.
The following table describes the LEDs on the operator information panel and suggested actions to correct
the detected problems.
Table 5. Light path diagnostics: LED status and actions
LED
System-locator LED
(blue)
Check log LED
(amber)
System-error LED
(amber)

Error LEDs

This section describes the error LEDs on the system board and the suggested actions to correct the
detected problems.
The system board has error LEDs that will help to locate the source of the error. Run the diagnostic programs
to find out the cause of the error. See "Dynamic System Analysis" on page 58.
The server is designed so that LEDs remain lit when the server is connected to an ac power source but is
not turned on, provided that the power supply is operating correctly. This feature helps you to isolate the
problem when the operating system is shut down.
Description
This LED is used as a presence detection
LED. You can use Systems Director or
IMM2 to light this LED remotely.
LED on: An error has occurred and cannot
be isolated without performing certain
procedures.
LED on: An error has occurred.
Action
Use this LED to locate the server among
other servers visually.
1. Check the IMM2 event log and the
system-error log for information about
the error.
2. Save the log if necessary and clear the
log afterward.
1. Check the system-locator LED
and check log LED and follow the
instructions.
2. Check the IMM2 event log and the
system-error log for information about
the error.
3. Save the log if necessary and clear the
log afterward.
.
Chapter 5 Troubleshooting
53