Try factory resets and if it's OOW I'd just forget about the feature as repair is often more than the set.
Also, be sure to see if RCA issued new firmware.
I have an RCA SLD48G45RQ , it's about a year and a half old. It works fine - I have playstation and wii hooked up to it, I can watch things from my computer on it with an HDMI cable, all without a hitch. But I can no longer connect it to the internet directly. As soon as I plug in the ethernet cable, the tv freezes and sometimes even turns off after freezing. I can't connect it wirelessly because I don't have wireless. I've used it for a year, watching Netflix on it no problem, with the ethernet cable plugged in direct.... Now, since a week ago, this problem has been happening, and I can't find any answers anywhere. No one seems to have an answer for why this tv would freeze as soon as it's connected to the internet. Please help.