upgraded to win 10 from w7 and run smoothly. After upgrade software update patch and shutdown normally, the NB cannot bootup afterwards. The power button only light up for 1 seconds and turn off. No sound no fan and no display. Refer by google search: Have try to solve by disconnect AC power and battery, then keep pressing the power button over 1 minutes. However the problem still cannot fix. Any suggestion from C Hing?