I am assembling a PC for the first time, and am having the "does not POST" problem. I've read through some previous threads here (googling the problem is how I discovered this website), and I THINK I have everything set up correctly, except for the CMOS jumper. I've found the place on the motherboard where the plugs go, but I can't find anything to plug in there. Is this something that would be coming from the case? The only thing coming from the case that isn't already plugged in is a bundle of four plugs, two three-prong and two single-prong. The three-prong plugs are numbered 1 and 2 and are labeled GROUND, +D, and -D. The single-prongs (also numbered 1 and 2) are labeled +5V. I thought this bundle was for the front USB ports, but I could be wrong. In case it matters, the specs are: Board: MSI K8N NEO2 PLATINUM Socket 939 NVIDIA nForce3 Ultra CPU: AMD Athlon 64 3700+ 2.2GHz Video: MSI NX6600 AGP 8x RAM: 2x 1GB PC3200 DDR 400 (currently only one installed, to cut down on the variables of the problem) All of these components are brand new. The power, case, hard drive and floppy disc are inherited from the previous system. Other things I've checked based on other techspot threads: Both power connectors are plugged in. The RAM is in the right slot and well-seated. I've tried booting up with each chip in the #1 slot, with the same result. So either they aren't the problem, or both RAM chips are bolluxed. The CPU fan is connected to the correct fan power connector. Something else I've seen suggested is to take the motherboard out and set it up outside the case to see if there's a short. I will try that next; I wanted to clear up my confusion about the jumper first. Thanks in advance for any help. J.