Down arrow key stopped working

[jenny_417_618]

Hello,
My down arrow key stopped working, How can I make it work again?

 

[WyomingKnott]

More than likely, by buying a new keyboard. Do you have any other keyboards that you could try with this machine? (I'm serious; I have at least three extras at home)

Is it sticking, or does it travel just like the other keys but just not send the command to the PC?