I bought a Corsair CX 500 PSU Last week. After fitting and plugin all the cables in my CPU, I found that after switch on the CPU, the CPU fan starts and then stops at BIOS POST CODE "50" and then again starts WHEN POST CODE reaches "FF" and then continues without any hassels. It is not happening all the time. It happens only when I starts my PC after a long hour break(eg. 1st time in a day). Is my PSU faulty or is this the particular PSU feature? Because before buying this PSU, I have another PSU of Zebronics, I have never faced this situation. Your suggestion is required ASAP.