What is the board. I'll test it for free (you pay postage) if I have the right hardware,
I can test JAMMA boards, Konami boards, Neo Geo boards/carts, Stunt Cycle boards, Sega Turbo boards, city connection boards, and some pong boards.
I can also test Vectorbeam and Cinematronics vector game boards but I won't, as a defective board can also break your monitor with those.