I'm not so sure if my problem lies with the motherboard or something else. I have an ECS 648fx-a mobo, P4 3.0, Radeon 7200, 1 gig RAM. I went to install my new hard drive and when I boot up the hard drive just starts clicking. When I install it into my old machine, it is fine. I have checked all of the cables to ensure I didn't accidentally install them backwards somehow. Also, when I remove the hard drive and try to get the machine to post, it doesn't. It does absolutely nothing. It poweres up, the fans all spin, the RAM leds light up and nothing displays on the monitor. Does anyone have any idea what the problem could be?