A couple of days ago my MacBook Pro started to act a little funny..it wouldn't start up. I kept trying ... finally , it turned on when I plugged in my charger . But the thing is it only turned on to the white screen with the apple logo and loading circle then would shut right back off . Sometimes it turns on again after that . Other times it doesn't. The charger is lighting amber and when I push the little circle button on the left hand side 3 to 4 green lights come on . Is there anybody who could please help me resolve this issue ?!!