While you wait for answers, we may have found some information which could help you.
Click here for Connection Computer Networkaudio device drivers for Dell Latitude E6400?
How to fix dell Inspiron 5040 laptop windows 7?
Dell latitude c400 intermitent lines on screen?
The Dell adapter can't be recognized?
dell inspiron 5040 plugged in not charging?
Right Click pad on my Lap top does not work, can this be fixed?