Allied Telesis AT-FS708 CentreCOM - Manual (Page 26)

Troubleshooting
16
Problem Solving
Is the Unit Receiving Power?
Check the Power LED on the front of the switch. This green LED should be lit.
Note
The switch performs a self-diagnostic test upon power on, and takes
about 20 seconds to complete.
If the Power LED is not on, check both ends of the power cord or adapter.
Make sure the power cord or adapter is plugged into a functioning wall outlet
and that it is properly inserted into the switch’s connector on the back of the
unit.
Is the Link/Activity LED Lit?
The Link LED on the front of the switch lights when a proper connection
between the corresponding 10/100Base-TX port and the equipment connected
to it is established. If this LED is not lit, check for the problems listed below
and make corrections as necessary.
1. Problem 1:
The cable has been cut, damaged, or it is the wrong type of cable.
❑ Solution 1:
— Try making the connection with a different cable. Be sure you are
using an undamaged cable of the correct type.
2. Problem 2:
Connected equipment is not turned on or not operating properly.
❑ Solution 2:
— Check the connected equipment (computer, another switch, etc.)
and turn on the power.