hello to everyone, im building a pc for the first time, and i have a soltek sl-k8an2e-gr mobo with a amd 64 3000+ , 1 512mb of corsair ram, and a geforce 5500OC AGP, and a 80gb maxtor sata hd, when i power everything up nothing shows up on the screen, and also when i plug in IDE cable to my dvd...