Any thoughts and/or suggestions would be greatly appreciated. I have stripped the system down to breadboard config to eliminate any electrical shorts but with no luck... No beeps, nada.
Motherboard: Asus M2A-VM
CPU: Athlon II 445
PSU: XFX Pro550W
RAM (x2): 2GB Kingston HyperX PC6400
GPU: Gigabyte Nvidia 280GTX
Backup and known working PSU: Generic 400W
Here are my symptoms:
On power-up the cpu, psu and gpu fans start. The power LED on the motherboard is alight. After about 3-4 seconds on, the power goes off. After another 3-4 seconds the system comes back on by itself and this loop continues until I switch off the psu or pull the plug. At no point do I get any POST beeps or video output.
The problem began when I switched out an 8800GT for the 280GTX. The above symptoms became apparent so I purchased the more powerful psu. Using the 8800GT again or no gpu at all produces the same problem.