i have a 2007 macbook pro 15". For sometime now, it has been having some issues coming on. When i plug it in to AC power, it would not come on until the battery is full and turns green.And when the ac power goes off, the laptop would normally just go off.so i thought perhaps the battery was getting bad.I used it like that for a period of over a month. Now the laptop has totally refused to come on even when i charge the battery full. When i plug in the battery its red, but then it takes like 5minutes to turn green.i have removed the battery, plugged it to ac directly but it wont still power up.