Lenovo laptop freezes and produces buzzing noise!

[Kanekiseu]

I was watching a video on my laptop (not on the internet) when it suddenly froze and started making annoying buzzing noise! It's been frozen and noisy for almost 2 hrs now and it's still not stopping. I wanted to shut it down/ restart it but keyboard is useless it wont work, the screen is also frozen. I dont know how to fix it and I'm really worried it won't recover till morning. Please what do i do to stop the noise and make it work again.

My laptop is Lenovo Ideapad 330-14IKB

 

[rgd1101]

use the power button. hold until it shut down