Hi Guys I hope one of you might be able to help me. I have a 15" Mac Book Pro version 10.7.4 2.2 GHz Intel Core i7 and suddenly it will no longer turn on unless plugged into the mains adapter, but the battery icon to the top right of the screen indicates the battery is fully charged and also the battery meter indicate full green lights. Has anyone else had this problem? And if so how did you fix it???! Thank you in advance for your response!