While you wait for answers, we may have found some information which could help you.
Click here for Battery Charging Dellaudio device drivers for Dell Latitude E6400?
Dell latitude c400 intermitent lines on 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?
Right Click pad on my Lap top does not work, can this be fixed?
how to repair my blank screen?