Aporte original por: starfoxhound ,
Have you tried opening it and unplug the battery? It is possible, here's how [guide|1667] Just unplug it for a few minutes. If it does not works, unplug it again, then press the power button for about 30 seconds, after those 30 seconds, and while still pressing power button, plug the battery and then plug the magsafe and turn it on again. This should reset the battery memory chip.