I don't know much about arcade cabinets, but i recently bought a street fighter cabinet that only has a white screen when turned on, and no sound.

The person I bought it from said that it was working up until a few months ago. He said the screen went white first then about a month later the sound. He also mentioned that it played like a hacked version where you can do fireballs in the air and other things. The jamma does have a capcom logo though. I don't really know what any of this means though, and was looking for a little help.