Also the CPU fan and the PSU fan and the other fans were working fine.
The only problem was the video error @ POST and no video output.
your video could possibly be fried. xP.
First you're going to have to replace that psu. then hook that psu and hopes everything works.
If that doesn't, you will need to replace the video from a friend or something an see if that works.
You can also try breaboarding (after you try another psu) to see if there might something else wrong.