I recently bought a new Vizio from wally world. 1080p 46" 120hz. My problem is that sometimes the remote to the 722k decides to quit working. Thought it was the remote but noticed, when I cut the tv off it starts working fine again for a few minutes up to a few hours. After that it dies again. Cut the tv off and back on and its working. Makes no sense to me. Any thoughts or advice about what I should do? Thanks.