Thank you all for your suggestions. I really didn't expect to get replies this fast.
I have tried all that you guys suggested and these are what happened....
Manual resetting does not work.. .. ... no responses what so ever.. ... not even the green light blinkering. And I have been trying for 2 days.
On the other hand when I plug it in the wall charger/usb cable to my laptop this is what happens..
1st green light, then blue light, then green again, then blue again, then the screen flashes (goes black from white and then white again) and finally no light at all. The lights goes completely off and the screen is back to white.
But once I unplug it the green light is back on and stays green for about 1 min give or take 5 secs.
I don't know what to make of these behaviors. I am not very bright on techs.