what's the model number of your extender? and the light status? Usually if the 2.4G/5G or signal light is on, extender is linked to your router successfully. Did you change the network name of the...

What's the model number of your AV1000 and AV500 powerline units? It's normal that home network light and wifi light flash. When the AV1000 turns red, it lost internet connection? It's the same way...

You mean the wireless password? If the extender is already set up, it has the same wireless password as your router.

What's the model number of your tplink? Does the uverse transmitter receive weak signal from your main wireless network? If the uverse is WiFi capable, you can use the extender to boost signal

please report to tplink support, told them the beta doesn't fix the problem. support@tp-link.com

You can send your request to TP-Link support: support.usa@tp-link.com