Acer v5 powering on does'nt continue..

..My acer keeps on flashing LED incator when you turn it on but does not continue to acer booting logo just like the normal acer.

1. I turn it on and the LED indicator is fine
2. it wont continue and keeps on flashing
3. still black but sometimes it power in specially when remove the back cover and turn it on in a slanted position.

PLEASE HELP ME, I NEED TO MY ARDUINO CLASS CA’UZ IM STILL STUDYING IN COLLEGE