Keyboard Razer Blade 15 RZ09-0288 technical electronic sheet

Hi, I'm looking for the technical electronic sheet for the circuits scheme of my laptop's keyboard - please help:frown_: . For my laptop Razer Blade 15 RZ 09-0288 advanced 2019, a group of keyboards stopped working as stated in the picture attached. I've bought a new original keyboard for replacement but with no success, it has the same malfunction. As far as I know, there might be a problem with the cables/pins from mother board connecting to keyboard , but in order to know what I'm looking for, I need you to help me to locate the exact cable corresponding to that group of keyboards. I'm using an external keyboard now, but this is very frustrating...:mad_: Thanks a lot!