It seems its actually the monitor... Its pretty old LCD with only VGA. I reset game's files so settings are now back to 1920x1080, 16:9 and everything works fine. Monitor just doesn't work with different resolutions and aspect ratios anymore which is kind of weird to me that it just stops...
I have a problem where monitor looses signal when launching certain games, meanwhile some other games work alright. I also get no signal when booting pc into recovery mode or BIOS. I wanted to check something in BIOS considering the problem and i wasn't able to. I thought maybe i may pressing...