I was trying to change the show on my TV and it did not respond the first time. I hit the home button expecting it to make the sound and go to the Home Screen but it went mute and the LED light under the tv turned solid white. I hit the home button again (I wasn't thinking it would break my TV). I've unplugged the tv for about 10 minutes and when I plug it in, the tv stays on a black screen and the LED light is white. Any ideas what could cause this or how to fix it?