Pc doesn’t power on after cmos reset

Hey guys I need some help.

I just upgraded my cpu and everything seemed to be going smooth except I found out that my pc doesn’t recognize my gpu anymore at all so after a lot of fiddling around a friend told me to reset the cmos battery so I did. Now after reseating the battery I can’t power on the system at all. No lighting, no rgb, it’s just dead. I changed nothing except the cmos battery out and back in. Taking the gpu out didn’t change anything either. Would appreciate any help