So this is a similar problem to many people. My computer turns on but shows no sign of any external interactions. The monitor doesn't pick up a signal, the keyboard doesn't light up anything. I've tried to reset my CMOS by pressing the CMOS button and removing the battery cable connected to the motherboard.
Some context, my current hardware is.
CPU: i7 6700k
GPU: MSI armor GTX 1080
MOBO: MSI Z170I Gaming Pro AC
SSD: Samsung 500GB
I also came back from a 4-month long summer break where before the summer break the computer was working perfectly fine. Once I came back plugged everything in that's where the problem started.
Maybe I'm not shorting the CMOS correctly or something? The manual is a bit hard to understand since the graphs are not very helpful imo.