Keep us in the loop, I'd very curious what you find out.
OOOOKAY. The problem or better problems are completely confirmed. So what we did when I came to his place is we both scrambled our PC's part by part and started from scratch. Two empty mobos on the table. First we put all he has in my motherboard, so GPU, CPU, RAM, SSD and connected it to his PSU which is modular so that we don't mess too much with cables. And guess what, it booted. It took like 30 seconds to even show the asrock logo, we were going to turn everything off but it booted, checked the disk and booted into his windows. After that we were very very confused since we did that earlier in my case with pretty much same components and it didn't work so what is the problem now since everything works. We go one by one. We switch out the RAM one by one then put both. Works in every case. Put my GPU back, it boots THANK GOD. So now it's narrowed to either SSD or CPU which makes no sense. We put my SSD and it boots into my windows. So its my processor 100%. After that its like okay my processor is dead that's why it didn't boot but what's wrong with his PC? I mean all the components worked before we were combining our components for the first time, it can't be the mobo right? So we put his CPU, GPU, RAM, SSD onto his mobo. It doesn't boot. We try a few more combos, it doesn't boot. In the end his motherboard somehow died and it happened in the process of me testing my GPU aswell as SSD and RAM on it??? But all in all with process of elimination we narrowed it down to what died and what didn't and thankfully I can RMA my processor and he can RMA his mobo since we both have warranty. The whole problem and process of solving it in the end was very funny and bizzare. Not one post gave us even the idea of something like this occuring but we solved it, together, somehow. Thank you for your replies and I hope this helps someone in the future.