Hi
Does your PC boot up normally without going into bios?
Is the screen connected to integrated motherboard graphics or a graphics card?
Boot choice menu often f12 on dell , f11 or f8 on other brands
This not to get into bios but change from booting of hard drive to DVD drive or USB device for installing windows or repairing windows
Motherboard usually come with a driver disk with a PDF user guide which shows how to get into the bios or uefi bios
If no driver disk go to gigabyte website
Regards
Mike Barnes