I bought a asus m4a77t mobo with Athlon 2 x4 640 cpu and 2x 2gb Trancend Ddr 3 1333 ram & 500w superchanel psu brand new. Useing my old hdd & Ati 4670 (Force 3d) card. When i switch the machine on all i get is a blank screen and the following bios error code. 1 long 3 short 2 short. I tested the cpu,ram,psu,hdd and grafix card in a friends pc and they all work fine so i thought it was a faulty mobo sent it back to the supplyer and they sent me a new board..... guss what........ same story all over again! Any ideas?