No Picture/No Sound

Question

After reading your response to my last question I called Philips. They instructed me on how to do a firmware upgrade. Well it solved the problem and now the led no longer blinks red 4 times. It stays green. I even had the tv working last night and went to bed a very happy man. I got up this morning and it turned on and the led is green. it even blinks when I use the remote but I have no picture and no sound. Any suggestions on this. Philips 42PF5321D/37. I may go looking for a new set TODAY.