I have that same keyboard and had it wrapped and in a drawer of other perhipherals for awhile and most of the number pad (i thought) had failed. after a good cleaning it worked as good as it ever did when I had it. Now I cant remember but I think the "actual keyboard" is a thin flimsy membrane material with just the pad under each key exposed, so if you wanted you could do the whole thing at once. be careful not to loose the rubber feet though