My screen starts up with the start up sound, but as just a mass of gray lines. After a while they turn the color of my background, and if I press the sound buttons up or down, they make the volume noises. If i hover my mouse near the top of screen, I can almost see edge of the pointer through the lines. I tried using my stepfathers pc connector chord to hook my computer up to the tv, and had my background come up perfectly on the screen - But not my harddrive, folders, or pointer, though I assume this is because it was for a pc. It was the round ended cable, and only had 4 of the prongs inside, while my mac is made for 7.