Make sure either the house power is on (battery disconnect switch on), or ignition switch is on. If it still doesn't turn on, try the reset as mentioned.
Next I would call Magnadyne. They have been very helpful to me. My ipod connection would not work. I also am a long way from a dealer. After following several suggestions that did not fix it, they sent me a new radio. (FR offered to find someone to replace it if I didn't think I could do it myself-but it was easy to swap.)
2012 Forest River Sunseeker 2300 Chevy