Enterasys Networks 24-Port manual Troubleshooting Checklist Problem Recommended Action

3

Troubleshooting

Refer to Table 3-1for a checklist of problems and recommended actions to resolve the problem. If additional support is needed, refer to “Getting Help” on page x.

Table 3-1 Troubleshooting Checklist

Problem	Recommended Action
Unit is plugged into the Enterasys Mid-Span	Verify the use of a good AC cable with a good
Power Hub, but main power LED is “off.”	ground connection.
	Verify that the AC is “hot” and that voltage is
	between 100 VAC to 264 VAC (50 Hz to 60 Hz).
	For the 24-port Mid-Span Power Hub, if the
	internal fan is working, there may be an internal
	circuitry fault or internal voltage that is out of
	specification. If the fan is not working, there may
	be an internal power supply fault.
Unit is plugged in and running, but the fans are	Verify that all fan openings are clear.
not working.	Verify that the metal case is not damaged.
	Verify that there are no loose parts inside the
	Mid-Span Power Hub.
	If needed, check and replace fuse at the inlet
	plug 10 A rated fuse.
The Mid-Span Power Hub operates but one of	Verify that you are using a standard UTP Cat. 5,
the powered devices does not work.	5e, or 6 cable, including all eight wires (four
	pairs). Try to move the same load into a
	different port on the same hub. If it works, there
	is probably a faulty port or bad RJ45 port
	connection. If possible, try to connect the load
	device into a different hub. Try using a different
	Ethernet cable; if it works, there is probably a
	faulty connection over the long cable, or a bad
	RJ45 connection.

Mid-Span Power Hub 24-Port User’s Guide 3-1