Sometimes this is a corrupted OS or other issue. We usually start with a Web Speccy report here and see if there's something there. If not a Factory Reset is tried to see if that clears it up. Along the way the cost is all about you and your backups of what you can't lose. The machine is already unreliable and that overheating could have corrupted the OS so a factory reset looks in the future steps.
Let's start with that Web Speccy Report. Here's how to share that report:
https://www.piriform.com/docs/speccy/using-speccy/publishing-a-speccy-profile-to-the-web
Hello!
Out of nowhere, my laptop started breaking, showing the blue screen with diferente errors (in the same day it showed a driver power state failure and a vídeo dxgkrnl fatal error). As of yesterday, I have no sound. I haven't installed anything and have no idea what's causing all these errors, as I haven't had any troubles with the laptop in a while (when it was under warranty, I had some heating issues which were resolved and it was more than a year ago).
Any ideas? Is it too expensive to fix?
Thank you!

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