|Get right back to basics. Use the motherboard that gives you the beeps. At least then you have a chance of identifying what the beeps mean.|
Test these outside the case.Connect only powersupply connections. CPU with it's cooling fan, One stick of ram, graphics, monitor and keyboard. Try starting up in this barebones configuration by shorting the PWR header with a screwdriver. What happens? What if any beeps do you get?
Goin' Fishin' (Some day)