Nonworking Composite output, G450

[villerk]

I bought my G450 last Spring, about in May. The TV output worked correctly with both S-VHS and Composite and I was happy and all. Then, suddenly, last month the Composite didn't work at all. S-VHS is still okay, but when I try to put Composite picture to the TV all I get is a black screen! I'm sure the TV is okay, because I tested it with a video camera and there were no problems with the picture. Is the card broken or the "pigtail" that's used to connect the G450 to the TV? I did remove the G450 from my computer and tried it with my friend's one, so is it possible that the Composite wire/plug has broken down on the way there (or back)? Do I need to buy a new one or what shall I do?