While you wait for answers, we may have found some information which could help you.
Click here for Dell D600 Poweraudio device drivers for Dell Latitude E6400?
My laptop is showing it is not connected to the network, but it is?
The Dell adapter can't be recognized?
How to fix dell Inspiron 5040 laptop windows 7?
dell inspiron 5040 plugged in not charging?
My Dell Inspirion Windows 10 laptop has no network socket?