Three beeps indicates a ram problem. Now the problem can either be your ram chips, or the on board ram on the logic board. I'd take out your ram chips, and if your unit still has the three beep problem, then that indicates the problem is indeed on the logic board...if taking out the ram fixes the issue, you need to replace your ram. All of our ram products can be viewed at the link below:
http://www.powerbookmedic.com/xcart1/cu ... hp?cat=257
-Bradley
PowerbookMedic