3com DUA1698 User Manual
Solving Problems Indicated by LEDs
31
Solving Problems
Indicated by LEDs
Indicated by LEDs
If the LEDs on the Switch indicate a problem, refer to
which
contains a list of problems and suggested solutions.
For information about solving problems when managing the Switch, refer
to the Problem Solving chapter in the “SuperStack Switch Management
Guide”.
to the Problem Solving chapter in the “SuperStack Switch Management
Guide”.
Table 5 Problems indicated by LEDs
Problem
Suggested Solution
A Power LED does not
light
light
Check that the power cable is firmly connected to the
relevant Switch unit and to the supply outlet. If the
connection is secure and there is still no power, you may
have a faulty power cord.
relevant Switch unit and to the supply outlet. If the
connection is secure and there is still no power, you may
have a faulty power cord.
On powering-up, the
Power/Self Test LED
lights yellow and a
Unit LED lights green
Power/Self Test LED
lights yellow and a
Unit LED lights green
The relevant Switch unit has failed its Power On Self Test
(POST) because of an internal problem. Contact your
supplier for advice.
(POST) because of an internal problem. Contact your
supplier for advice.
A link is connected and
yet the Status LED for
the port does not light
yet the Status LED for
the port does not light
Check that:
■
All connections are secure.
■
The devices at both ends of the link are powered-up.
■
The connection uses cross-over cable if you are
linking a 10BASE-T or 100BASE-TX port with a device
that is MDIX-only.
linking a 10BASE-T or 100BASE-TX port with a device
that is MDIX-only.