Its a computer that has never had drivers or anything on it. I bought a NEW j pac and i'm still havng the same problem. I have tried different wires, different computer, made shure they both had separate power outlets that were 3 prong,I pluged it in the the vga out that the optiplex comes with and it's the same thing. All tho it runs a few minutes longer thew the Arcadevga before it messes up than the stock vga out. Do i have to cut one of the wires to the JAMMA before i install it? because the problem is definitely between the J pac and the JAMMA harness. I can send you a video of everything if you need it. but i don't know were to go with it now.