it just keeps turning on then off until I tried it with 4 or 5 attempts, it wont turn on anymore.
but if I look at it at a bright room or point it with a flash light, I noticed that the screen changes when holding the power button.or connecting the charger
to Dark Green - if the screen is all black, holding the power button at 10 seconds will make the screen go dark green
to Black - if the screen is Dark Green, it will turn black if I connect the charger or if I hold the power button 3 seconds.
im guessing that the device is turned on when the screen is black and off if the screen is dark green