Keyboard laptop acts weird, types jkl,jkl, everytime.

Any of you has this problem? Is it a technical problem or software problem? It types jkl, jkl, jkl, randomly, and sometimes acts weird, like lock the computer automatically.


Laptop is Inspiron 1520.

I had some similar problem on an old laptop. It was a faulty keyboard. I had to disconnect it from the MB and use an external USB keyboard.
How old is your laptop?
Did you ever had some liquid on it?

Try clicking the FN and Num Lock keys at the same time. On my keyboard, the FN key is next to the right hand CTRL key.