Can’t reach BIOS using my keyboard

Excuse me, I want to ask…
My keyboard cannot be used to enter the bios, but can get into windows ..
Before my keyboard cannot be detected [keyboard ps2]. I try to use another keyboard remains the detect [keyboard ps2] … then I use a converter USB to ps2… but to her as a HID detect…
So now my keyboard is not able to get into bios
Please help.
