It could be as easy as turning up the +5VDC just a tad so the board is receiving just a tad over +5V DC. But of course could involve more. I'd buy it for $100 if the monitor is in good working condition, that alone is worth it there.
I agree. I'd buy it just for parts, if nothing else. Sharpshooter is actually a decent game, non-violent gun game, good for kids/family fun, but also challenging enought for adults. Very similar to a police trainer or egg venture. I'd buy another one for the street if I ever found one.