buzzing crash

Basically my prebuilt PC worked fine for 2 years since the last freezing issue and nothing has changed in the System except that I changed my thermal paste a few weeks ago. This week my PC started randomly freezing with a horrible buzzing sound. The only way to get the device out of this state...

Hi, guys! My Lenovo V310 got overheated while I was at work and got shutdown automatically. Now, it's not turning on and is constantly making a buzzing noise. When I try to turn it on, it makes more buzzing noise but more like a bit stronger clicks. At first, it wasn't making any noise at all...

Mostly it happens once a day where I'll be doing something on my PC, then my screen will freeze and my headphones will have a loud buzzing sound then my screen turns black but pc stays on and I have to turn it off and on back again to use it. I've already tried tons of things Temp is around...