Hello, System Specs: Motherboard - P5N-D CPU - E6700 Memory - 2x2GB Corsair XMS2 Video Card - Radeon HD 5870 PSU - Thermaltake 750W Problem: Computer powered off while in the middle of me using it. Tried to power back on, but nothing happens when the power button is pressed. Tried unplugging the power supply and back in, still would not power on. Troubleshooting: Hooked up my PSU to a PSU tester I have = Good Replaced Motherboard = no change (indicator light is on, on the motherboard) Checked power switch = Good I also tried taking out my video card, left one stick of ram in, and still nothing. ---------- The only thing i haven't checked is my CPU, I have just ordered the E8400 in hopes this will fix my problem, but I was hoping to get a little feed back on my situation as I have come up empty when searching online for a simlar problem. I appreciate any feedback I can get! Thank you!