That is what i am leaning towards A bad ac power supply, They replaced my first box as it finally quit working after unplugging and replugging the hdmi a million times I have found I don't even need to unplug the hdmi only the ac. And from the box if i unplug it from the wall it doesn't reboot I also got the same remote and power supply back that is why I am looking into both of your ideas. ne cooling the box down and getting a new transformer /ac adapter. will let you know I am surprised more people are not having this issue I have 2 vixo 2,s and both do it. I have read some body leaves it on all the time in a warm room with no problems I still love this box and will fix it. And what happened to Mickyhop mart??