That is HP and see if they offer such. I know that on hp.com I often find the model laptop and documentation but you have to do that. The 2100 is a series and ... not the model.
I have a presario 2100. It has a wireless mini-pci slot on the laptop and i found a card that will work. But i havent/ couldn't find the antenna cords for the wifi when i cracked open the slot. Am i outta luck?