Newly Built PC Crashing with Alternating tones from the pc speaker.
The Problem:
I am building a new computer for a friend with some of my old components left over from my last upgrade. This computer has a Gigabyte GA-7N400 Pro 2 Rev 1.0 motherboard, Amd Athlon XP 3000+ Barton, 1gb Kingston Value Ram (2X512), Soung Blaster Live!, 40gb Hard Drive Ide, Sony 12 X CD Burner, Some sort of Compaq DVD-rom and an Old Geforce 2 GTS Card. This is not built to be a gaming machine if you are wondering. Main problem is here after being on for two minutes the screen goes blank and I hear this alternating tone pattern coming from the PC Speakers (not beeps more like lower tones). I looked at the manual for the board about post beeps and it doesnt say anything about this.
What I have Tried So Far:
So far I have tried both ram chips in a combination of slots and even trying just one ram chip but same results. I tried disconnecting everything except the video card and hard drive but still get the same results. I tried connecting another fan on the side for extra cooling but still nothing.
Does anyone know anything that could be done to fix this problem. I really need to get this computer up and running as soon as possible.