One time when one of my friends was messing w/ my computer, he broke off one of the keys, it attached back fine, basically you could pop it off (pocket knife???) and put tape on the little clip that holds it in place. It should work. I would sugest "gaffers tape" rather than electrical, its a little thicker (black ducktape type stuff...) and it should blank out the light. But if its an LED, you could just take it out and put on a simple wire in its place. (ps to take leds off see the Red to blue mouse page, i forgot what its called...)

-Knife