I have a Dell Latitude C600 that I dropped once long ago without much
long-term issue, but for a short time a couple of the keys were iffy
and didn't always work. Everything was fine for a year until I was
carrying it around in its bag the other day, as I do often, and it must
have gotten a little jostled around, since some keys have stopped
working again (t, y, backspace, function keys).

Since the problem corrected itself the first time and was fine a long
time, I'm wondering if something gets loose that I should be looking at
before I go replacing the keyboard. Anyone have any experience that
might shed any light on the problem?