Lenovo Legion 15IMH05 keyboard problem

[MrDadosz]

Hello, I have lenovo legion 5 15imh05 (board: nm-c911) and I have a problem with a keyboard.
When I hold power button for ~30 seconds or unplug RTC battery keyboard will work only one time. After laptop reset or shutdown, keyboard won't work.
In 90% cases when I unplug power supply and turn on laptop on a battery, keyboard works even after plugging power supply - I can't turn on laptop with a power supply and get keyboard working.
Shortcuts Fn + F1-F12 are working. Keyboard is fine.
I replaced IT8176FN-56A and reprogram it with a dump from previous chip and it worked for 2 months until Windows updated firmware. New and old chips have the same data programmed.
What could I measure before replacing that chip again?

[MrDadosz]

After replacing L23 coil keyboard works perfectly.

[MrDadosz]

I found that L23 coil could be bad.On one side it has 1,1 Ohm and on the other is 0,9 Ohm. I'll check that tommorow.

[MrDadosz]

After replacing L23 coil keyboard works perfectly.