My toshiba p755d-a5172 keeps turning off for no reason. I replaced the battery, bought a new charger, opened it up and cleaned up the fan, restored windows, and it still shuts off on its own. Sometimes it turns right off. Sometimes it gives me a couple of hours and then it turns off. I really dont know what to do anymore. Its not over heating, its Charging, it just shuts off. Its driving me nutts please help!