Due to some picture proboems I'm having I'd like to get into the service menu to see if using the "factory reset" cures the problem. Using the "Mute, 1, 8, 2, power" method that I've read in several places won't work though. Is there another code I can try? Or some other way into the service menu? What might I be doing wrong? I also tried another sequence of buttons that won't work. Any help gratefully received!