Hi Debra, You may download the drivers from the links below: Steps to download drivers: Hope it helps. 
I have been looking for the answer to the following questions ever since Wednesday, I saw on here that someone said to install the chipset so I did but I still can't get online and all the yellow question marks are there. I hope some else has ran into this before and can help.   Thanks 
Yellow question marks on ethernet controller,Multimedia audio controller, video 
controlller Dimension 2400