My tv may have been struck by lightning. This morning, when I try to power it on, it comes up with a greyish black screen and the audio, then shuts off and turns back on, at first with audio only, then the audio stops, and the screen is a solid color (first couple of times red, most recently green), and all three buttons on the front light up. I changed the color wheel out myself about a year ago, and have had no problems with it since then. Any thoughts?