Well, the old Dell X200's keyboard gave up the ghost. Not entirely, but the good old backspace key stopped working, and it's really hard to use a keyboard without a backspace key.
Happily, it was easy to fix, as follows:
- Buy a replacement keyboard (I bought my "like new" replacement keyboard through eBay for about $20)
- Remove the battery
- Unscrew the six screws from the bottom of the Dell marked with a (K)
- Lever out the old keyboard from the bottom left. There is a little latch there.
- Before fully removing the keyboard, un-snap the ZIF ribbon connector
- Remove the keyboard completely
- Slide the new keyboard into place
- Push the keyboard cable into the ZIF connector; lock the ZIF connector
- Screw the keyboard back in place with the six screws
- Reinstall the battery