Okay, it is clear you don't know very much about computers. (No offense) BIOS is what boots first in your computer. It is the motherboard's firmware on ALL computers. There is even UEFI, a new type of BIOS. It looks like your motherboard is UEFI.
Try your VGA cable, now go into the graphics card's settings and see if there is an option for HDMI output. Then disconnect the VGA cable and try the HDMI cable.
What is the make and model of your graphics card? You can run an app called GPUz to find out if your not sure.