Freshly-built rig. I turn on the power, It makes the POST beep and displays the boot screen. Then, It says "CPU Fan Error" while giving a continuous beep. It locks up and won't let me into the BIOS because it doesn't think the fan is working. After a few seconds it force-shuts down. The CPU fan is spinning, and I've tried it in every header and it still works, but I can't get the computer to recognize that. All suggestions are appreciated!