We may have found other answers which could help you.
Click here for Lcd Display Working
device driver downloads for Dell Latitude E6400 PCI Port & PCI Controller?
dell inspiron 5040 plugged in not charging?
Dell latitude c400 intermitent lines on screen?
My laptop is showing it is not connected to the network, but it is?
My Dell Inspirion Windows 10 laptop has no network socket?
The Dell adapter can't be recognized?