HI, I turned on my laptop this morning and some keys stopped working, what can you do?
Well, if no more keystrokes are registered it could be due to dirt. Or did the button somehow jump out of its anchorage?
In both cases you would have to remove the button, clean it if necessary, and then put it back on properly. With laptop keyboards it is sometimes not that easy, but as long as nothing is broken it should work. Just be careful, maybe look online for instructions.