My AP 220 is awesome however first F# left of center C is very loud. All the other keys respond to action of playing but this key is way too loud. How can I fix it?

SOURCE: Dell Inspiron 640M left touchpad key on palmrest has lost its action

You can check the manual at support.dell.com. Click on 'Product support' on the left and click manuals. Choose your model and click 'view html'. click Palmrest. and it will show you how to reinstall it or get underneath the keys. If it seems defective, you can get the palmrest (which includes the keys and touchpad) from dell's spare parts sales at 877372335.

SOURCE: mx5000 keyboard - Not all the keys are responding

I had a similar problem after about 6 months of use with this combo. It didn't bother me for a long while then more keys started to go. What I did to fix it was. I took the keyboard apart and using tissue paper and rubbing alcohol I cleaned all the contact points on the thin sheet of plastic that makes it all work. Put it back together and it worked great, in fact it still works and this was over 4 years ago. I hope this helps. And remember don't be scared you can fix it.

SOURCE: Touchpad has no tap, left key not working.

Hi there,
I had this issue and resolved it by doing the following:
-Open the start menu by using the windows button
-Use the arrow keys to highlight run and press enter
-Type 'control panel' and press enter, find the mouse properties and enter
-From the buttons tab in mouse properties, go to double click speed and change to slow and confirm the changes
-At this point it probably still wont work, so do the above again but change the double click settings to fast and confirm.
-Restart your PC and this should resolve the matter. you can alter the double click speed again if you wish :)

Hope this helps,
tbo

SOURCE: Space bar, left-side enter key and backspace do not respond.

Try buying a can of compressed air and cleaning around those areas if you have spilled liquid on them ,that could be the prob as well

SOURCE: Keystation 61 key won't play

Most of these use conductive rubber pills that are pressed onto circuit board traces by the keys.

Clean the board AND the pills with 99% isoprophyl alcohol and QTips.