My radio cuts on and off suddenly. Also my radio switches channels on its own.

You all are not going to believe this. through trail and error I've discovered that the battery was taken out of the car and when it was replaced the battery was not fully tighten. I've tighten the battery now everything works find. I could have taken it to an audio shop and really gotten hosed down. Thanks all

Wow that is fantastic! There is no better problem to have than one you can fix for free!