Vostro 5568 i7 turns off instantly while just rotating the cover slightly

Hi, I am new to this group and help from this community is badly needed from me!

Just few days ago, I have purchased Dell Vostro 5568 i7 7500 CPU @ 2.7 GHz.

It is running with Win 10 Pro, 64 bit OS and 8 GB RAM

Problem is, it turns off instantly while just rotating the cover slightly.

Then for starting it, when I press the power button, it does not respond at all. In that case I connect the AC adapter to start over the machine again. However sometimes connecting the AC adapter does not help; as I insert the power jack, the yellow indicator at adapter turns off and need to unplug and plug it from the switchboard. 

Interestingly when I successfully connect the AC adapter (yellow on), that time my charging indicator near the touch pad blinks for certain seconds and then turns off. (Usually it shows white while charging and the screen is folded.

Can anyone help me to diagnose the issues?