Ah! Never thought it would be so easy to make a screen shot in BIOS. The magic keystroke is not “Print Screen”, but is F12 instead.
Most of the modern motherboard should support this, but first thing you need a thumb drive. Plug in the thumb drive into your USB port before you start up your machine, and then enter BIOS.
Press F12 keystroke anytime when you want to screen shot the BIOS. Your bios wait for your command which place you want to save your screen shot.