I just recently started having this problem, yesterday in fact. I don't know what is causing it but I reaallllllly need to fix it, I have a project with a deadline. Basically I turn on my computer and it powers up, POST beeps, and then it sits there in the POST screen forever. It's an ASUS M2N-E SLI board, 4x2GB sticks of RAM, AMD Athlon 64 X2 dual core CPU. I have 4 harddrives, with windows 7 installed on one and windows xp installed on another. The problem happens even if all the harddrives are unplugged. Last night I was having the problem and I unplugged all the harddrives but the one with 7 installed and it booted just fine, today even that didn't work. I don't know how else to describe the problem, but if there's any more information you need please let me know. Please help me fix this guys!