Keys F1,1,Q,A,Z,Backspace,F12 don't work
First let me say that the keyboard is not wet.
Since a lot of months ago, these keys don't work when I'm using the battery (with or without the battery charger connected), but if I remove the battery and use the computer connected to the charger, all the keys work fine.
The "big" problem is that since yesterday these keys no longer work with or without the battery.
I opened the computer and checked that the keyboard is correctly connected to the motherboard, and the cable connection below the trackpad seems to be fine.
The really strange thing is that until now the keyboard worked fine without battery.
My upper case model is the one with silver cable.
Please, can anyone tell me something to do in order of trying to repair the keyboard without having to buy a new one?
Is this a good question?