Specifications

Hardware Reference 27
C613-03075-00 REV A
Some common problems and how to solve them
Link/Activity LED on any port is off
This can indicate:
■ A loose data cable.
■ The device at the other end of the connection is not working properly or is
turned off.
■ The data cable is not wired correctly.
■ The network administrator has manually disabled the port through the
software.
■ The port’s selected transmission mode does not match that of the attached
device.
Perform the following steps in sequence:
1. Make sure the data cable connections are secure.
2. Make sure the device at the other end of the connection is switched on and
working properly.
3. Check that the data cable is wired correctly.
4. If you can, log in and check the port status. See “To log In” on page 11 for
more information on how to log in.
5. If the port is Enabled, make sure the transmission speed matches that of the
connected device (auto-negotiating, full or half-duplex).
If the port is disabled, someone has used the software to manually disable it. You should
find out why the port was disabled before enabling it.
Power LED is off
This can indicate:
■ A loose power cord.
■ A power supply failure.
■ A FOM is installed in that bay.
Perform the following steps in sequence:
1. Check that the power cord connections are secure.
2. Check that all switches and circuit protection devices are in the ON position.
3. Ensure that the supply voltage is within the operational range (100 to 240
VAC 47 to 63 Hz for AC models, 36 to 72 VDC for DC models).