Question when I plug in my computer charger, my keyboard no longer works

[nicoscha]

Hello, I am French and I use the Google translator to submit my problem to you.

I thank you for your patience and for your answers.

My laptop, a lenovo legion y520, works perfectly when not plugged into an outlet.

The only problem is that when I plug in my computer's charger, the keyboard (integrated into the computer) no longer responds. everything else works perfectly (sound, image, ping, pad, etc.)

However, the keyboard remains backlit.

I've been looking for the problem for months and haven't found anything similar.

If my computer is plugged in and charged to maximum, the keyboard starts working again, then stops working, starts working again, then stops working. If I want to write "qwerty" it will write "qry". as if going from 100% battery to 99.99% would put the computer back into charge and turn off the keyboard. and so if I'm not 100% it just doesn't respond

I can assure you, since I've been struggling with this, that it has a direct link with plugging in the computer.

I'm sure there is a file deep inside my computer that cuts off my keyboard when the computer is plugged in. But I don't know where this file is located.
something like :
keyboard-charging-work 1 or 0

Factory restore: done
bios update: done
Delete and update Drivers: done
checking my charger with a telemeter (20v output): done


Intel(R) Core(TM) i5-7300HQ CPU @ 2.50GHz 2.50 GHz
8,00 Go (7,89 Go)
64 bits, processeur x64
gtx1050
windows 10 family

 

[Ralston18]

Laptops are designed to be used while being charged.

Regarding "file deep inside":

There would be little or no value in being able to turn a laptop off while charging per se. And disabling just the keyboard would be of little, if any, value.

Besides, if no one is to use the laptop while being charged then the screen lock should suffice.

My thought is that plugging in the charger is causing a physical electrical short or a physical disconnection of the internal keyboard. Either one thus disabling the keyboard.

Gently wiggle the connections involved. Determine if the wiggles (versus connecting and disconnecting) cause the keyboard to work or not work.

May be an intermittent issue: sometimes occurs, sometimes does not. Possibly related to heat (expansion/contraction) and/or vibrations.

Test using a known working wired USB keyboard to determine if the keyboard problem stops, continues, or gets worse.

Objective being to narrow down the possibilities involved.