3com 4050 Manual De Usuario

C

HAPTER

 4: P

ROBLEM

 S

OLVING

If the LEDs on the Switch indicate a problem, refer to the list of suggested 
solutions below.

Check that the power cable is firmly connected to the Switch and to the 
supply outlet. If the connection is secure and there is still no power, you 
may have a faulty power cord or an internal fault. Firstly, check the power 
cord by:

■

testing it in another device

■

connecting a working power cord to the ‘problem’ device

■

installing and testing a second PSU

then contact your supplier for advice.

Either:

■

The Switch unit has failed its Power On Self Test (POST) because of an 
internal problem. The fault type will be indicated on the unit LEDs. 
Contact your supplier for advice.

or

■

A port has failed and has been automatically disabled. You can verify 
this by checking that the Port Status LED is quickly flashing Yellow. If a 
port fails the Switch passes its Power on Self Test and continues to 
operate normally.

The port has failed and has been automatically disabled. The Switch 
passes its Power On Self Test and continues to operate normally, even if 
one or more ports are disabled.

The PSU has failed or you may have a faulty power cord. Firstly, check 
whether a temporary fault has occured by removing and replacing the 
power cord connected to the PSU. If the problem still occurs, check the 
power cord by:

■

testing it in another device