I am not tech savy so have done nothing since I bought this system new in 2004. I was getting picture and audio then it would go in and out to a black screen every few seconds. Had over 80% sat signal when I checked then did a restart and now the fan and drive sound like they start up but no start up menu comes on the screen just a black screen. I left it unplugged for hours then tried again; still nothing. Power supply problem or just fried? I have looked through posts and did not see something similar to this yet.