A friend spilled milk on a Lenovo Ideapad Yoga 13 laptop.
Several keys on the keyboard either did not work or displayed on or two wrong characters.
Lots of vids shows howto remove the keyboard:
- Here is the repair manual
- Here is a cleaning howto
- Someone tried to change a keyboard – still same keys did not work. In that case the keyboard controller might have been damaged
If cleaning and change keyboard won’t fix then you can use an external USB or bluetooth keyboard.