So I was playing fallout 4 and my computer crashed. It reboots and shortly after awhile it crashes again. Now this time it won't post/boot. All the fans turn except the graphics card (graphic card works but not when I run it with the other devices). Iv tried switching graphics cards with one that does turn on but still nothing. So I then assumed it was the psu (still might be) and I took that psu and hooked it up to another computer and powered it on. The computer booted up just fine so I was unsure if it was actually the psu. (Also I have all ready tested ram and hard drive and the were still good) now I debated whether or not it was the cpu or the mother board. I have read that the cpu rarely fails so I began trouble shooting the mother board (and because I don't have another motherboard with the same socket to check the cpu). I took out all the ram and waited for the error beeps but got none. so I though it might have been the motherboard and I got a new one. Sadly there is no change. Nothing still post. Please help me.