My daughter has a MyFi that has worked fine up until a couple weeks ago, now she can't get but about 5 stations. The antenna (magmount for car) went south and was replaced with a spare that I had and it seemed to pick up channels okay, but I didn't look any further than turning it on and getting a good signal. Her remote will turn the unit off, but not on. She checked the batteries in remote and changed them. Tried the refresh and no change. Is the unit toast or ??