My surface was working perfectly fine on one day, then the next when i went to unplug it from the wall it shut itself off instantly. The battery registers as 100%. It works fine as long as its plugged in, but instantly shuts off when unplugged, and pressing the power button when unplugged does nothing. I have tried the pressing the power and voloume up method to force it to start, but that gives no response. I'm not sure is its a hardware issue or windows 10. Any suggestions?