Another pc problem. Sorry if Im cluttering this section with my problems lol To cut things short, I recently bought a Corsair TX 650 watt power supply (bought used on eBay but the seller said it was barely used and in mint condition) to upgrade from the CX 430 watt that I have, for gaming. I took out the 430 watt, installed the 650 watt, connected the SATA, 24 pin and all the other ones on my ASUS P7H55 M Pro motherboard, reconnected some other cables that I disconnected like the front panel ones. Anyway, after all that, my PC wont boot up at all. It does show the green light on the motherboard, which means power IS going to the motherboard, but something is wrong. I don't think it's the cables since I've connected them the same way as my old 430 watt. Now the interesting part is, my PC worked perfectly fine with my 430 watt; fans lit up and the usual noises of a working PC. But when I took out the 650 watt after a couple of hours of trying and re-installed the 430 watt, I had the same problem; green light on motherboard but PC wont boot up Is there a problem with any of the hardware components? Im beginning to suspect that it might actually be the motherboard itself, since I had a very similar problem before. I had an Intel media series motherboard and every time I tried to boot it up, it wouldnt work at all, not until I replaced the motherboard with the current ASUS PH7H55 motherboard that I currently have. I seriously hope that is not the case and I misplaced a cable somewhere or maybe it was the power supply being DoA. Can anyone help?