please watch this video, its just some of the footage about my laptop not being able to turn on when i press the power button. sorry about the audio. please if u can, tell me whats wrong with this laptop, so maybe i could look for help and fix it, thank you in advance.[laptop was not dropped, did not spill water, nothing its all fine its just that it wont turn on.]

Couldn't really understand the audio. If the laptop works with an external monitor then it is an LCD or LCD inverter problem.

It could be the power jack. Try to move the power jack adapter about as you power on.
If the power jack is damaged, the battery will not recharge, and the laptop will only have enough battery power for a second.