Light Path Diagnostics Leds - Lenovo System x3500 M4 Installation And Service Manual

Table 10. The suggested actions to correct the detected problem for each LED light (continued)
LED
2. Look at the light path diagnostics panel on the front of the server. Lit LEDs on the light path diagnostics
panel indicate the type of error that has occurred. The light path diagnostics panel LEDs are visible
through the bezel. See "Light path diagnostics LEDs" on page 135. Look at the system service
label on the top of the server, which gives an overview of internal components that correspond to
the LEDs on the light path diagnostics panel. This information can often provide enough information
to diagnose the error.

Light path diagnostics LEDs

The following table describes the LEDs on the light path diagnostics panel and suggested actions to correct
the detected problems.
Look at the light path diagnostics panel on the front of the server. Lit LEDs on the light path diagnostics
panel indicate the type of error that has occurred. The light path diagnostics panel LEDs are visible
through the bezel.
• 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 11. Light path diagnostics panel LEDs
LED Description
A hard disk drive has failed or is
Hard disk drive/
RAID missing. A SAS controller or a
ServeRAID controller error has
occurred.
Fan A fan has failed, is operating too
slowly, or has been removed.
Description
Action
1. Check the LEDs on the hard disk drives for the drive with
2. Reseat the hard disk drive backplane.
3. Check the LEDs near SAS controllers or ServeRAID
4. For more information, see the .
5. If the error remains, replace the following components
6. If the problem remains, go to
1. Open the fan cage cover to reseat the failing fan (with lit
Action
b. Check the IMM2 system event log and
the system-error log for information
about the error.
c. Save the log if necessary and clear
the log afterwards.
a lit status LED and reseat the hard disk drive.
controllers and reseat the corresponding controllers.
one at a time, in the order listed, restarting the server
after each:
a. Replace the hard disk drive.
b. Replace the hard disk drive backplane.
c. Replace the SAS controller.
d. Replace the ServeRAID controller.
http://www.lenovo.com/support.
LED).
.
Chapter 4 Troubleshooting
135