Solving Problems Indicated By Leds - 3Com SuperStack II 3C16987 User Manual

Solving Problems
Indicated by LEDs
If the LEDs on the Switch indicate a problem, refer to
contains a list of problems and suggested solutions.
Table 6 Problems indicated by LEDs
Problem
A Power LED does not
light
On powering-up, the
Power/Self Test LED
lights yellow and a
Unit LED lights green
A link is connected and
yet the Status LED for
the port does not light
For information about solving problems when managing the Switch, refer
to the Problem Solving chapter in the "SuperStack II Switch Management
Guide".

Solving Problems Indicated by LEDs

Suggested Solution
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.
The relevant Switch unit has failed its Power On Self Test
(POST) because of an internal problem. Contact your
supplier for advice.
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.
31
Table 6 which