I'm not sure you can test it if you had the pin out for the d-sub, a volt/ohm meter, and the values each pin is supposed to return. Unfortunately, I don't know any of this information. Maybe we can arrange a deal where i buy it off you at your cost, I test it on my system, and if it works i send you a little more cash. If it doesn't work i can send it back to you for a refund?