I just bought a Asus ROG GR8 desktop and a Asus VG248qe screen. The desktop is powered and plugged to the screen with a HDMI c

*I just bought a Asus ROG GR8 desktop and a Asus VG248qe screen. The desktop is powered and plugged to the screen with a HDMI cable, but the signal just says dvi no signal and then turns black. How this can be solved?*