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A
D
LED I
IAGNOSING
NDICATORS
P
C
OWER AND
OOLING
I
NSTALLATION
T
ROUBLESHOOTING
Table 12: LED Indicators
LED Status
Action
Power LED is Off
◆
◆
Diag LED is Flashing
◆
Amber
◆
Link LED is Off
◆
◆
◆
◆
◆
P
ROBLEMS
If the power indicator does not turn on when the power cord is plugged in,
you may have a problem with the power outlet, power cord, or internal
power supply. However, if the unit powers off after running for a while,
check for loose power connections, power losses, or surges at the power
outlet. If you still cannot isolate the problem, the internal power supply
may be defective.
Verify that all system components have been properly installed. If one or
more components appear to be malfunctioning (such as the power cord or
network cabling), test them in an alternate environment where you are
sure that all the other components are functioning properly.
– 44 –
Check connections between the switch, the power cord, and
the wall outlet.
Contact your dealer for assistance.
Power cycle the switch to try and clear the condition.
If the condition does not clear, contact your dealer for
assistance.
Verify that the switch and attached device are powered on.
Be sure the cable is plugged into both the switch and
corresponding device.
If the switch is installed in a rack, check the connections to
the punch-down block and patch panel.
Verify that the proper cable type is used and its length does
not exceed specified limits.
Check the adapter on the attached device and cable
connections for possible defects. Replace the defective
adapter or cable if necessary.
ES-3026/3026P
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