I've looked on Google already and tried all of the fixes for this problem but none worked. I'm starting to worry that I have a broken Bios chip since I did order my Mobo from eBay, but the motherboard does beeps when I start it up with missing ram and my ram's leds glow when pluged in. All of my fans that I've plugged into the mobo works fine and my GPU's fan spins and I could feel it getting warm. HDD works fine as the hdd light flashes and I could hear it spinning. All fans going to the PSU works fine and I'm pretty sure i'm not shorting the back of the motherboard.
My monitor when plugged to nothing has this box looking thing that floats around and when i plug it into the DVI port on my pc it turns black so my cord isn't the problem.
I'm using fairly old parts so the problem could be anywhere. My parts are ATI 5870, Sigma monster 750w, 4 gbs geli black dragon ddr2, core 2 duo q9550, p5q se plus and a WD 500 HDD