Hello, it seems like I have defective logic board on my PM G5 Dual 1.8. It wont boot, the fans just run super high so I reset the PRAM, SMU, changed the hard drive, changed the RAM and it's still the same. Can someone tell me which logic board model I need? The computer has 4 DIMM slots. Inside the case it reads "Apple Certified Recondition 5/12/2005". Not sure if that's the manufacture date or the recondition date. Thanks in advance...