The other day my tv stopped accepting any commands from the remote control. Thinking it was the remote, I tried using the buttons on the tv with no results either. So I shut the tv off via the cable box. When I went to turn it back on, it would not power up. At that point, I unplugged it and let it sit overnight. The next morning the tv turned back on but after a few minutes, it won't respond again. Any thoughts to my issue?? Thanks in advance