Okay, since I always have a lot of issues I troubleshoot, I guess I'm going to make a central thread. There's a few troublesome computers here in the shop from time to time, and if I've hit a wall, I'll post (lol) here. Right now, I have a customer built computer in the shop. Unfortunately, it will not boot, and it definitely doesn't post. I've eliminated the usual suspects. The power supply is sufficient, and works properly. The motherboard is brand new, and correctly installed with no erroneous contact shorts. The video card, while it is unknown good, has been replaced with a known good card. Still no output. I pulled the Athlon II (I think it's quad core) processor to check for obvious issues (bent or missing pins, incorrect installation, etc). It was incorrectly installed when I inspected it (no bent pins). The locking lever had been thrown before the processor had been installed. A simple re-seat was all that was required. I don't know if that itself caused damage, but it's installed correctly now and no change. This is the motherboard. This is his video card. This is the memory. The mobo reviews say that the board does have issues with RAM. Unfortunately, I'm having trouble accessing the QVL from ASUS, plus I'm not getting any beep codes. Let me know if you guys need any more info.