Question can't entering bios with usb keyboard

May 17, 2019
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i have zebronics 945 motherboard and ps2 keyboard mouse, yesterday my ps/2 port not working so i replace usb keyboard mouse. after changing keyboard i cant enter bios. i have reset cmos now it asking to press F1 to bios and F2 to boot, i cant press F1 or F2 because my usb keyboard not working on bios.
 
May 17, 2019
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USB to PS/2 Adaptor may work
I can sympathise, I am using an old motherboard, and when I want go into the bios I have to plug my very old ps'2 keyboard in.
Sadly your ps/2 has died and maybe an adaptor will help, but not sure.
I tried with usb to ps/2 adapter but that also not working.
 

AllanGH

Notable
Mar 10, 2019
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Firstly, check the PS/2 port with a different PS/2 keyboard. If it works, you're golden. If it doesn't work, then continue below:

Check motherboard for a fuse that is protecting the PS/2 port.

If one is present, check it with a multimeter and replace it, if necessary. (Yes, soldering will be necessary.)
(You can jumper the fuse with a piece of wire, but I do not recommend it.)

If one is not present, or you cannot replace/jumper the fuse that is there, it's time for a new motherboard.
 
May 17, 2019
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i have checked with another working ps/2 keyboard but same issue continued. when i power on the cpu keyboard lights blink then turn off. mouse light glowing continuesly. but both not working in bios and windows.

How to find ps/2 fuse on motherboard. where it is located.
 

Karadjgne

Titan
Herald
Unplug the mouse. Plug the USB keyboard into the same place the mouse was.

USB has a switch in the bios. Either partial (default) or full USB on power on. You'll want to switch to full. Usually there is 2 USB ports at least that power on, kb and mouse, while all other ports are shut down until after boot.
 

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