Hi, I have a Surface Pro 2 that started playing up with the power button, but now does not even boot up. Initially when it wasn't booting up, I did the hold the volume up/down and power button combination and it worked, but now nothing seems to get it to boot up, all I can see is a black screen with nothing popping up. I know it has some power as when i press the windows icon it buzzes, but that's it. I have tried several times to power up ...... a couple of times I saw the keyboard backlight flash and that's about it. Really stuck now. Please can you suggest anything........also the typecover keyboard is not working .......but that is a secondary issue. I ahve tried the key combinations with/without the keyboard to no avail.