Table 2. Light path diagnostics panel LEDs (continued)
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 Action
TEMP The system or the system
component temperature has
exceeded a threshold level. A
failing fan can cause the TEMP
LED to be lit.
1. Make sure that the heat sink is seated correctly.
2. Determine whether a fan has failed. If it has, replace it.
3. Make sure that the room temperature is not too high. See
“Features and specifications” on page 7 for the server
temperature information.
4. Make sure that the air vents are not blocked.
5. Make sure that the heat sink, the fan on the adapter, or
the optional network adapter is seated correctly. If the fan
has failed, replace it.
6. If the failure remains, go to http://www.ibm.com/systems/
support/supportsite.wss/docdisplay?brandind=5000008
&lndocid=SERV-CALL.
FAN A fan has failed, is operating too
slowly, or has been removed. The
TEMP LED might also be lit.
1. Reseat the failing fan, which is indicated by a lit LED near
the fan connector on the system board.
2. Replace the failing fan (see “Installing a dual-motor
hot-swap fan” on page 124).
BOARD An error has occurred on the
system board.
1. Check the LEDs on the system board to identify the
component that caused the error. The BOARD LED can
be lit due to any of the following reasons:
v Battery
v (Trained technician only) System board
2. Check the system-error log for information about the error.
3. Replace the failing component:
v Battery
v (Trained technician only) System board
22 System x3650 M4 Type 7915: Installation and User’s Guide
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