This problem started when I wanted to upgrade my Asus P5VDC-MX motherboard to an Asus P5RD2-VM to gain a pci express port for gaming reasons. I was running an Asus P5VDC-MX with a 3ghz p4 630and 512 od ddr memory. I purchased to new asus board (p5rd2-vm) a sapphire 1600xt, and a 512mb 667mhz ddr2 gigaram chip. I installed the parts and it booted fine, no post errors, or bios errors. Windows started detecting all the new devices and installing the drivers from the motherboard cd provided. I believe it was on the audio driver at the time but, the pc lost video. I waited for about 10 minutes to see if was just installing the video driver but it never came back.
My Attemps at fixing it:
I cut the power and waited about a minute. I plugged it back in and still no video and now the power cuts off by itself after about 5 seconds. I unplugged and removed all optical drives, moved the video to the onboard and removed the memory. I then got the memory post beeps, still no video. I installed the memory again and the post beeps are gone again and still no video. I tried moving the processor and the old motherboard back into the system to get up and running again. I had the exact same problem, no video and it cuts off after about 5 seconds. I then RMA'd the motherboard. With the new board same problem. I then bought a new power supply, same thing. Finally I RMA'd the processor. Installed it and now it doesn't cut off after 5 seconds but still no video. I also returned the new power supply and returned to old one figuring if they both did the same thing the old one wasn't bad. I'm all out of idea's, I hope someone can please help me.
Thanks in advance