deskthority

Hello! I recently bought a 2nd-gen NMB AT keyboard, and after plugging it into my AT to PS/2 adapter and my active PS/2 to USB adapter, it doesn't work. Neither of the adapters are the problem, since I tested them with another AT keyboard and a Logitech PS/2 keyboard.

The lock lights work, and toggle between on and off, but typing text does nothing whatsoever. Would anyone know why this is the case?

Nobody could give an answer if asking question like this.

Atleast give some info like keyboard photo, better PCB photos.

Protocol compatibility is the cause I guess.

You were right, it was XT instead of AT.