I am building a system for a friend and after putting everything together and pressing the power button, nothing shows up on the monitor. I have already tried resetting the CMOS/battery, reseating everything (CPU, RAM, video card), booting the system out of the case, booting the system inside the case, flashing the BIOS to the latest version with ASUS's BIOS Flashback feature, trying the video card in a different PCI-E slot, and trying different video cards. Still no POST or anything. The only thing I haven't tried yet is trying a different CPU, like an Athlon II X3, to see if that is compatible. How can I fix this problem? The CPU I am using is an AMD FX 8320.