lenovo 330s-15ikb, led num lock key always on and numbers don't work

[resistor83]

hello everyone, I have a particular problem with this lenovo ideapad 330s-15ikb. I had to replace the motherboard due to liquid damage, after replacing it I noticed that some letters on the keyboard do not work. So I bought a new keyboard and now all the keys work except the numeric keypad area. In practice the num lock key LED always remains on and the numbers do not work. Has anything like this ever happened to you? I also tried changing the keyboard again but the same defect remains on the numeric keypad.

I tried updating the bios but the problem remains

https://streamable.com/c8sj3h (here video)

[mon2]

Review the keyboard scan lines as they mate to the EC. The EC is the keyboard scanner with its internal 8051 / ARM processor.

[m1ch43lzm]

Maybe you got a motherboard for the 14" version without numeric keypad?
https://www.badcaps.net/forum/troubl...4ikb-schematic

Check post #14 for the schematics and silkscreen (no proper boardview, but it'll do)

Compare the values of RI13, RI20, RI21, RI25 on both old and new boards, you may need to modify the new board to match