I have read similar problems on the website, and one solution was always to try a new keyboard. But this is a new keyboard and I just bought and installed it right now. It's my first time to open my laptop, so I don't know what might have gone wrong. The keys that are not working are
- prt screen
- backspace and Num lock
- up and down arrows
- Space bar
For completeness, although I guess it is irrelevant, my touchpad is not working either now.