ZyXEL Communications PLA-4xx Series V

Chapter 5 LEDs and Troubleshooting

PLA-4xx Series User’s Guide 51

VThe LINK light does not turn on.

1Check all PLA-4xxs on your network have the latest firmware installed. PLA-4xxs with

the latest firmware cannot communicate with PLA-4xxs using earlier versions of the

firmware. Go to Section 3.4 on page 30 for instructions on installing the latest firmware.

2Use the PLA-4xx Series Configuration Utility to detect all other HomePlug devices on

your powerline network. Make sure that the network name (sometimes called the

network password) is the same on all of your powerline adapters. See Section 3.3 on

page 28 for instructions on checking the network name.

3Check the DAK password and MAC address for all powerline adapters are typed

correctly in the utility. See Section 3.3 on page 28 for instructions on checking the DAK

and MAC address.

4Make sure that all your powerline adapters are HomePlug AV compliant. Check the

package it came in or ask your vendor. This PLA-4xx can not detect earlier versions of

HomePlug powerline adapters such as HomePlug 1.0 or 1.0.1. (Although they can

coexist on the same electrical wiring without interfering with each other.)

5Make sure that the powerline adapters on your network are all on the same electrical

wiring. Connect another powerline adapter into an outlet close to your PLA-4xx’s power

outlet. They are probably now on the same electrical wiring. Check the LINK light.

If it now lights up your powerline adapter was probably previously on separate electrical

wiring. Ask an electrician for more information on the electrical wiring in your building.

6If your powerline network is using coaxial cable, check all powerline adapters are on the

same coaxial cable.

7If your powerline network is using electrical wiring (not coaxial cable), check you do not

have a power meter between powerline adapters. Powerline signals cannot pass this.

VThe POWER and LINK light blink at the same time.

• You have pressed the ENCRYPT button for more than three seconds. Try setting up a

connection again, this time pressing the ENCRYPT buttons on both devices for less than

three seconds.

VThe PLA-4xx Series Configuration Utility displays an error during installation.

• Make sure your computer is using Windows XP or Windows Vista (32-bit) operating

system. At the time of writing, this is the only compatible operating system for the

configuration utility.