Hey everyone, thanks for all the replies!
I'm guessing the capacitors are those round plug things on the left side? (I'm sorry, sorry, sorry - I'm not too bright with this stuff) I did go and check inside the computer again and saw 3 of those were rusted/burnt-looking lol So thank you for catching that JJ - I wouldn't have had a clue unless I took it to a repair shop and they caught it.
My question now is: what would be the easier thing to do? Buy a new motherboard like BluerJB suggested? Or replace the capacitors? - And if you could point me in the direction of where to buy either of these, I'd really, really appreciate it.
I'm beginning to think it's not the cooling system myself as I haven't had any issues with the computer crashing/shutting down on its own like I had with a previous liquid cooling system where the coolant just sort of evaporated. The computer shut down then never started back up again. I also have no idea how to check to see how much coolant is inside the cooling system I have now - if this is important for me to do, I'd love it if someone could instruct me on how to do that.
Thanks so much everyone! I'm soooo sorry for being kind of clueless about all of this.
*Edit: I'm opting to just replace the motherboard lol Hopefully this fixes my problem! But if anyone has anymore suggestions for me, please go ahead and shoot them my way!