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Hi, and thanks in advance

I have a AV500 + Extender WPA4220 and they have been working for 1 year without problems, but the POWERLINE LED has suddenly stopped:

* the wifi light of this gadget is unavailable, and the differents gadget I have (like phones or tablets) are able to detect it, but are not able to connect with it.
If you try to connect one of this gadget with the wifi-net, always appears the same message: "unable to connect because there is no connection to internet"...
* Also the 1st and 2nd Ethernet ports doesn´t work.

Three days ago it works perfectly, and I´ve tried to reset the system or to pair again the adapter and the extender, but still does not works...
Could you help me, please?

I Look forward hearing from you

Thanks in advance.