Can you override caps lock (water damage) with an external keyboard

a few years ago i had water damage in my keyboard and replaced the keyboard. it worked fine up until the moment it didnt.

at the moment i have a couple more internal keyboards as replacements that i thought would fix the issue but it seems like the issue is really the motherboard.

//** QUESTION. is there a way, upon pluging an old keyboard or wireless that i can override this "fault connection” between the keyboard and the motherboard? a very old MAC keyboard? i've tried other old keyboards but the shift/caps keeps itself on

i've tried to unplug the internal keyboard from the motherboard and use just an external keyboard but everything stays the same. caps lock OR shift hold pressed is always ON…