Sometimes the adapter connecting the battery to the motherboard gets loose from unsafe carrying. I've opened this laptop a few times, changing the hdd, ram, and this has happened to me a few times. To illustrate this better I attached a link to the part I am referring to. (my laptop disassembled ) Once you disassemble the laptop, it should be a quick fix. https://www.dropbox.com/s/yg6uaj78tsrn5h...