We were walked through the process by dish network.  The WiFi was only needed to watch shows from the web.  Shutting down WiFi, did disable the ability to watch shows from the web.  If we wanted to watch these shows, we would have to drop a Ethernet cord down.   It seems  Dish network should know how to fix the joey problem. 

I may contact them and perhaps I would get a different tech.

Mary

From what I have read CFL and some LED light bulbs can cause dirty electricity, so replacing those might be a good idea

dimmer switches look harmless, but they are not.

here are  some videos  I like the 3rd one best.  I hope this helps.