My custom pc's fans spin up and the lights go on. I can here the cd and hard drive turn on. For some reason, nothing comes up on the TV. I can o ky assume that it's failing POST but I don't know why. Specs: CPU: amd fx 6-core VIDEO CARD: MSI radeon 7770 MOTHERBOARD: asus m5a97 PS: ark-tech 500W Please help!!