While you wait for answers, we may have found some information which could help you.
Click here for Dell Laptop PlugDell latitude c400 intermitent lines on screen?
audio device drivers for Dell Latitude E6400?
how to fix dell inspiron 1545 date and time?
How to fix dell Inspiron 5040 laptop windows 7?
device driver downloads for Dell Latitude E6400 PCI Port & PCI Controller?
The Dell adapter can't be recognized?