ZyXEL ES-3148 Guida Utente

ES-3148 User’s Guide

This chapter offers some suggestions to solve problems you might encounter. The potential 
problems are divided into the following categories.

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•

V

The Switch does not turn on. None of the LEDs turn on.

1 Make sure you are using the power adaptor or cord included with the Switch.
2 Make sure the power adaptor or cord is connected to the Switch and plugged in to an 

appropriate power source. Make sure the power source is turned on.

3 Disconnect and re-connect the power adaptor or cord to the Switch.
4 If the problem continues, contact the vendor.

V

The ALARM/ALM LED is on.

1 Disconnect and re-connect the power adaptor to the Switch.
2 If the problem continues, contact the vendor.

V

One of the LEDs does not behave as expected.

1 Make sure you understand the normal behavior of the LED. See 

.

2 Check the hardware connections. See 

.

3 Inspect your cables for damage. Contact the vendor to replace any damaged cables.
4 Disconnect and re-connect the power adaptor to the Switch.
5 If the problem continues, contact the vendor.