I recently upgraded my motherboard and processor from a Gigabyte GA-B85M-DS3H Motherboard and an Intel Celeron G1840 to an AMD F2A68HM-HD2 Motherboard and an AMD A4 Series Dual Core (A4-4000) but it doesn't seem to boot properly. The fans come on, the monitor says its picking up a signal from the GPU (I changed GPU just in case but the same problem persists) and the LED lights come on but nothing on the screen. I think it may be a memory problem, I have 2 Corsair 4GB DDR3 sticks. Could it possibly be a compatibility issue? Does AMD accept Corsair memory? I haven't tried the memory bus troubleshooting method yet as of typing but I'm just wondering what other possibilities it could be in case that doesn't work.