monitor shows "no signal"

[MilanH]

A few days back I bought a new motherboard, so I set everything over to the new motherboard. It was not compatible however, I found out, so I set everything back to my old motherboard. my pc would not start, the fans and lights would turn on but off after like a second, and every 5 seconds it would try again. I solved this by first booting up with only my cpu connected, then gpu and in the end it worked just fine with everything connected. However, when I connect my pc to my monitor the display shows "no signal input". Also, my keyboard does connect correctly with my pc, as all the lights turn on, but my mouse does not. even if i plug it in the usb connector on my keyboard. I usually use dvi connection, but I also tried hdmi which did not help.

What I've tried so far:

-connect the monitor to another pc, no problem here everything works just fine.

-connect the cable to both the motherboard input and gpu input. neither work.

- connecting it with one ram stick in use, nothing again. 

-checked all cables, everything seems connected correctly. 

 

my specs:

-cpu: intel i7700

-gpu: Asus geforce gtx 1070ti

motherboard: MSI H110 pro-vd

-RAM: Corsair Vengeance RGB pro

-PSU: Corsair CX450 M