Hi there. This evening, while watching TV on my 40H80, the display suddenly went dead. In fact, the TV may have powered off -- in any event, within a few seconds, I had turned it back on (or it remained on), with audio only (i.e. a blank screen). I turned the TV off, and after 5 minutes, turned it back on. The display was initially very bright and lacking in color balance; it went completely back to normal within 10 or 15 seconds, except now there are faint, wavy lines all over my screen, particularly visible against a black background. Any idea what the cause might be and whether I can expect it to improve on its own?