MacBook Keyboard Not Working

Grazie Alisha C, grandissimo lavoro !!!!

Un grazie speciale al Team LGBTQ technicians

I didn't solved my troubles yet, I've only Q an D witch are not working so I'm using also the visual keyboard. I started some test you written, it's very interesting.

I've already changed keyboard, reset all parameters including PRAM, SMC, started in safe mode, checked touchpad... Well

Now I'll try to change the keyboard / touchpad cable, if it's not solved it means it can only be the logic (main) board. I hope not !

Your list helps me a lot. Thanks !