Three keys on my laptop has suddenly stoppped working. THE letters A,S and the DEL key...anyone know what could be wrong? I plugged in a keyboard and this works fine, but would like to fix my keys on the actual laptop. Any advice would be appreciated

How to remove laptop keboard HERE (http://www.refurbished-laptop-guide.com/how-to-replace-laptop-keyboard.html) How to clean laptop keyboard HERE (http://www.computing.net/howto/simple/keyboard/)

I saw one link where the data cable connected to the keyboard had worked loose,

and caused intermittent errors.

in the meantime get a USB keyboard for a quick fix