I just finished building my first computer and am now having a problem. I started the computer but i have no display on my monitor. The Videocard is plugged into the PCI-E slot and has power. (i know this because an LED light is on and the fan is spinning) its a 480watt PSU. I get no beeps at startup. i do get a POST code 0.4 but i checked my Motherboard usermanual and nothing listed that code. need help!!!!