Laptop Screen Blacking Out for 4 sec almost every minute

Hi, y'all.

Not sure if this is the right place to post this, but I'll push my luck.

So, I've been having this problem with league where my screen blackouts for 4 sec in almost every minute (even in loading screen after champ select). It's kinda frustrating as it gets in the way of my playing.

I've done several methods that have been suggested online already (updating drivers, reinstalling the game, changing high dpi scaling, etc.) but to no avail. I've even brought my laptop to the store I bought it for checking, but they said they found no problem whatsoever.

My laptop specs are: Intel i7-8750H, 2.2GHz 16 GB Ram Nvidia GeForce GTX 1060 (It's a Lenovo Legion Y530 btw).

I just bought this laptop last Wednesday and it sucks not being able to enjoy a game I've been playing for almost 7 years now.

I hope someone can help me with this. Thanks in advance!