Yeah, so as the title says, I'm in pretty desperate need of help here. So I started building a PC a few hours ago for my Dad who needs it, well, urgently. I said I'd have it ready by now but I've run into a problem. Basically the thing isn't turning on. I've checked everything and it seems to be fine, so I'm not ruling out the possibility of having burn it out at some point. But since I don't have much experience with building PCs, I'm guessing I may also have done something wrong. I'm using an Asus P5K-VM motherboard. 450w power supply so that's not the issue. Everything looks like it's been connected properly. The ATX12V, EATX and EATX12V (4 pin) are all connected. Initially I had forgotten the 4 pin EATX12V so I had swapped the ATX12V with the EATX12V to see if that'd work. Would that have burned it out? Is there anything in general I could have done? Whenever I connect the power to the PC, the green LED on the motherboard (which indicates power) turns on. But when I press the power button, nothing happens. I'm pretty sure the power switch is working too. I've connected in every way possible, and it still seems to be working. Does anyone know what could've happened? Is there anything anyone can name? I might be able to spot the problem. I really, really need help if someone can get back to me. Thanks in advance for any help.