IBM 7383 Installation And Service Manual page 156

Table 11. Light path diagnostics panel LEDs
v Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
v If an action step is preceded by "(Trained technician only)," that step must be performed only by a trained
technician.
LED Description
Hard disk drive/ A hard disk drive has failed or is
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. The
TEMP LED might also be lit.
Temperature The system temperature has
exceeded a threshold level. A
failing fan can cause the
Temperature LED to be lit.
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System x3500 M4 Type 7383: Installation and Service Guide
Action
1. Check the LEDs on the hard disk drives for the drive
with a lit status LED and reseat the hard disk drive.
2. Reseat the hard disk drive backplane.
3. Check the LEDs near SAS controllers or ServeRAID
controllers and reseat the corresponding controllers.
4. For more information, see the .
5. If the error remains, replace the following components
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.
6. If the problem remains, go to http://www.ibm.com/
supportportal.
1. Open the fan cage cover to reseat the failing fan (with lit
LED).
2. Replace the failing fan (see "Installing a simple-swap
fan" on page 259).
1. Make sure that the heat sink is seated correctly.
2. Determine whether a fan has failed. If it has failed,
replace the failing fan.
3. Make sure that the room temperature is not too high. See
"Server features and specifications" on page 6 for the
server temperature information.
4. Make sure that the air vents are not blocked.
5. Make sure that the fan on the adapter and the network
adapter is seated correctly. If it has failed, replace the
failing component.
6. If the failure remains, go to http://www.ibm.com/
supportportal.