The other day I moved my sound card to a different PCI slot further from my video card, hoping for better air flow. After plugging everything back in, I turned the comp back on. I could smell a burning so I unplugged, opened it up and found the PSU to be the root of the smell. I replaced the PSU and the computer would still not start. I replaced the mobo and it started. At that time I didnt have time to finish things up, but it started. Now, this morning, I moved it to another place, plugged it in and started it. Since the case was still open I could see the mobo and a bright light came from a circuit near the graphics card, along with a burning smell. I unplugged and the circuit is singed. What could cause this- again? I don't know of any serious causes so I dont know how to go about troubleshooting, any help would be great. Thanks.