It sounds like there is gunk underneath the key cap and into the key retainer clip assembly. If you're lucky, you can get away with removing the key cap and cleaning underneath it. Otherwise, you may need to purchase a replacement laptop key retainer clip.

If you need to replace a single key, here's how to do it: The easiest and most common method for removal is to place the index finder in the corner of the key cap and gently pull up. If the key does not separate from the retainer clip, try the same on an diagonal corner. When the key separates, there is a distinct "snap" sound as the plastic hooks on the underside separate. Once you are able to lift up on one corner, do the same to an adjacent corner. At this point the laptop key can be lifted up and removed from the keyboard base. The key cap will always have a little play in it so if this method does not work, a small screwdriver can be used to gently lift up the key enough so you can observe the way the retainer clip attaches to the back of the key. This information can be used to determine the best way to remove the key cap. For larger keys, there my be an extra metal bar that hooks into the base of the laptop keyboard. The metal bar will always slide into two metal brackets on the keyboard base so...

Hey I used this site a while ago when I had the same problem: http://www.laptop-keys.com. I ended up trashing the plastic clip and had to get a new one but I remember it only being $3-something. You may need to do that.

Hey, we own a child care and this happens to us more than you can imagine. We always use http://www.laptop-keys.com to find replacement laptop keys for our laptop and other parents'.

Also, you can visit http://www.laptop-keys.com for some great tutorials and blogs on how to clean and replace laptop keys as well.

Try removing the key caps, cleaning underneath them and putting them back on. Chances are, there is crud underneath them and they are not making a connection. You can find some good tutorials on this at http://www.laptop-keys.com. You can also find replacement laptop keys there as well if you happen to break any in the process.

You can pick up replacement laptop keys for I think less than $4 at http://www.laptop-keys.com

Yes, keys are definitely replaceable. In fact, there are online shops that specialize in such thing. Check out http://www.laptop-keys.com to find laptop key replacement and repair kits.

The website http://www.laptop-keys.com has some great videos on replacing laptop keys and they also sell repair kits if you need one.

You can try visiting http://www.laptop-keys.com. The specialize in replacement laptop keys but my be able to help you out with this problem.