While you wait for answers, we may have found some information which could help you.
Click here for Laptop Hard Drive ReplaceDell latitude c400 intermitent lines on screen?
The Dell adapter can't be recognized?
how to fix my g520 laptop?
how to repair my blank screen?
device driver downloads for Dell Latitude E6400 PCI Port & PCI Controller?
My laptop is showing it is not connected to the network, but it is?