cydvog wrote on 2026-05-14, 17:52:

Hi recently got ps2 keyboard - brand new -

But after booting to bios and windows 98 keyboard not detecting. Tried many bios settings with no luck.

Well while trying combinations i noticed when removing and reinstalling keyboard on windows from ps2 port it works. So while its a new keyboard is there any conflicts with old systems?

have you tried using the ps2 to usb adapter that usb mice that time used?

Dont have ps2 to usb adapter

Using native mice and ps2 keyboard

cydvog wrote on 2026-05-14, 17:52:

... after booting to bios and windows 98 keyboard not detecting. Tried many bios settings with no luck.
Well while trying combinations i noticed when removing and reinstalling keyboard on windows from ps2 port it works. So while its a new keyboard is there any conflicts with old systems?

After unplug/plug working - does keyboard still work after soft (not hardware) restart?

Does "tried many bios settings" (with keyboard not working) mean:

Keyboard always works in BIOS?
or you have another (perhaps USB) keyboard as well?

Try doing the unplug/plug thing to get it working, then unplug any other keyboard, change some keyboard settings/save within Winblows - it may not be smart enough to remember it's keyboard on simple swap.

DaveDDS wrote on 2026-05-14, 20:06:

After unplug/plug working - does keyboard still work after soft (not hardware) restart? […]
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cydvog wrote on 2026-05-14, 17:52:

... after booting to bios and windows 98 keyboard not detecting. Tried many bios settings with no luck.
Well while trying combinations i noticed when removing and reinstalling keyboard on windows from ps2 port it works. So while its a new keyboard is there any conflicts with old systems?

After unplug/plug working - does keyboard still work after soft (not hardware) restart?

Does "tried many bios settings" (with keyboard not working) mean:

Keyboard always works in BIOS?
or you have another (perhaps USB) keyboard as well?

Try doing the unplug/plug thing to get it working, then unplug any other keyboard, change some keyboard settings/save within Winblows - it may not be smart enough to remember it's keyboard on simple swap.

İ ve another usb keyboard to change bios settings. Btw ps2 one keyboard not working bios

I'm assuming this mainboard does have a PS2 keyboard port? and the PS2 keyboard is not connected through some kind of PS2 add-in card.

If yes, then the BIOS should work with a PS2 keyboard.

Most likely the BIOS has "seen" a USB keyboard and is now assuming that is the primary input device.
Have you tried it with the USB keyboard disconnected?

Guessing you have - so you probably need to get BIOS reset without the USB keyboard commected... hard to do if you can only way to "talk" to BIOS.

Another way would be to disconnect the battery and leave it for a few hours to insure the CMOS has drained.
If you have a jumper setting to discharge the CMOS that makes it faster, otherwise you might have to leave it for a day.
If your BIOS supports mouse, you might be able to do a FACTORY RESET with the keyboard disconnected.

It is *possible* (but unlikely) that the mainboard has PS2 only for mouse and does not support PS2 keyboard.
Winblows has it's own drivers and does not go through BIOS - and seeing the PS2 port change state may be enough to get it to reload associated drivers, hence the plug-unplug makes it work.
But ... I think USB mice were more common before USB keyboards, and given that Winblows CAN talk to the PS2 keyboard, it seems unlikely that the board maker would not have supported PS2 keyboards.

I just had another thought, I have had boards with two PS2 ports, 1 for keyboard and 1 for mouse ... and they had to be in the right place.
If the board has an old-style 5-pin DIN connector for the keyboard, this is probably also true (but in this case you could use a PS2->DIN keyboard adapter)