11-30-2010 10:53 PM
You need to replace the keyboard, that is the only solution. You can buy a new keyboard on ebay for about $18 (w/free shipping), here's a link http://cgi.ebay.com/NEW-FR-IBM-Lenovo-3000-N500-42
Installing the keyboard by yourself is easy. Remove the battery and unscrew the 4 screws. Then flip laptop back to the front, and pop out the switch cover (you may need a piece of plastic like a guitar pick). Unscrew those screw and remove keyboard. Replace with new one.