I have a 2000 V6 Stang and there have never really been any major problems with it that I know of (I wasn't the first owner.) But yesterday when I went to start it, it didn't. The power was on but the engine wouldn't turn over, or even really do anything. Then after trying it a few times the power completely went off. My battery meter on the dash says that I have more than 3/4 power... but we tried jumping it anyway. When we did, it started for a minute but then died again. I am pretty sure its the origional battery that came with the car so could that be it? There's a ton of corrosion all over the positive terminal and we tried cleaning that off and it didn't really do anything. I've also been told it could be the alternator. What do you all think? Could it be anything else? Thanks for the help in advance.