I got an old 14in monitor from a guy who died, and when I plugged it in and turned it on, nothing happened except that the light went on. WHen I plugged in the D-sub, the monitor started smoking and sparking from the little black box in the middle of this picture. (the one connected to the red wire that conects to the suction cup on the picture tube.) What is this, and is there any way I can fix it? I don't need to use the monitor, I just love to learn things.