My sister's white macbook goes crazy sometimes. The charger sometimes doesnt work randomly, like it just plainly doesnt charge at all, the orange light doesnt come in meaning its not charging. Please do not say did you try different sockets or whatever because im sure you know I would try all of those before coming here and posting on this thread. This usually lasts for 6-24 hours roughly or something like that and one time it lasts for 3 days. I cant really tell you much more than this as my sister doesnt keep track of these things and it also happened last night to her while i was asleep, and lasted for like 12 hours or something. Please Help