Oh, btw, the clue that it might be your cable modem is the fact that the channels didn't show up on my iphone when using the app as well.
I was missing channels 1 - 100. I reset the router and channels 1 - 100 show up and are viewable. All is fine......until the next day when I have to do the same thing all over again.
This is the pattern - the only way I can receive channels 1 - 100 is with a router reset each day.
This need to reset the router everyday has gotten old very fast when the others in my family are doing something on-line......there is never a good time to disconnect and reconnect.
So what gives - is there a way around the need to reset the router every time i want to use my Roku?