Just bought this and I installed it for my father. First before the cable company hooked it up to their HD receiver. Funny, my dad thought the picture was great even before it went to HD; likely due to the size of the screen. Anyways after he turns the set on, it eventually fades to a darker screen, still visible and okay to view but noticeably darker. We reset it, which is time consuming and a PITA; then the screen goes back to normal until the next time h turns it on and it does the same thing all over again. This should not be normal for this TV, and so you know it does this from day one and before and after the switch was made to HD. Therefore, it would seem to me, it has to be the TV.