I had the same thing happen recently. After a power outage, it would not show any wireless networks, not even the "not shown" icon, just a blank screen. I usually see my network plus 3 of my neighbors'. After trying reset, reboot, and all the other suggestions Roku and this forum suggest over and over again, Roku finally sent me a new unit. It worked pretty well for two days, then got slower and slower until it will no longer retrieve a movie. All functions work as slow as molasses. I went thru all the resets, reboots, and all over and over again, and now I'm sick of the whole thing. I think I'm ready for a competitive device!