I have recently bought a 2nd hand don't bravia kdfe50a12u but the picture was dark up untill today when I went to switch it on and its flashing red to green for a few moments before stopping and the red light to the left of it coming on as if its on stand by... could some body please help me by telling me what the problem could be as I like the tv and am on a budget so can't. Offord a new one. Thanks in advance on any help giving.