Troubleshooting, 1 power, hardware connections, and leds, Chapter 37 troubleshooting – ZyXEL Communications ES-3124 User Manual
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ES-3124 Series User’s Guide
279
C
H A P T E R
37
Troubleshooting
This chapter offers some suggestions to solve problems you might encounter. The potential
problems are divided into the following categories.
•
Power, Hardware Connections, and LEDs
•
37.1 Power, Hardware Connections, and LEDs
V
The Switch does not turn on. None of the LEDs turn on.
1 Make sure the Switch is turned on (DC models).
2 Make sure you are using the power adaptor or cord included with the Switch.
3 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.
4 Turn the Switch off and on (DC models).
5 Disconnect and re-connect the power adaptor or cord to the Switch (AC models).
6 If the problem continues, contact the vendor.
V
The ALARM/ALM LED is on.
1 Turn the Switch off and on. (DC models)
2 Disconnect and re-connect the power adaptor to the Switch. (AC models)
3 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
.