I just finished building this PC and there is no operating system on it yet. Whenever I try to enter the BIOS, I get a message that says "CPU fan error, F1 to enter SETUP". If I push F1 at this point, nothing happens. The cpu fan is spinning, and I have tried it in multiple cpu fan ports and it works in all of them. I am using an Intel Core i7 4820k CPU with a Cooler Master Hyper 212 EVO cooling system. Does anyone know how to fix this error?