Vinard,   I would try installing the drivers in the correct order and see if everything starts working. How to Download and Install Drivers in the Correct Order   You could try running the full diagnostics and see if there are any error messages. How to Run the Dell™ Diagnostics Utility     Rick
I have a Dell Inspiron 1420.  It had a bad NVIDIA card so I replaced the motherboard with a VOSTRO 1400. I moved my Hard drive, memory and wireless card to the new motherboard.  I have all the drivers in and working except the Network Controller, therfore no internet.  Where can I get the correct driver for this?
Network Controller not working