Lenovo YogaBook Win10 BlackScreen?

On day i was using my yogabook, it had about 20 battery, i left it for a little bit, i was using my phone, the screen went black by it self, i assumed it went to sleep, i quickly touched the keyboard to wake it up it did not work, i pressed the powerbutton, still black screen, so i held the power button until it shutoff, i turn it back on, it showed a loading screen that had "starting windows" on it, it took really long time, when i was done, it went black screen again, i shut it off by holding the power button, turn it on, it showed Lenovo logo, then goes black screen, now it does not want to turn on, the light on the side flashes but nothing shows up.