First of all, does you laptop still have a valid warranty? Is so dont even attempt it!
I have seen that before. It happened to a friend of mine, he tried to replace it but he ended up buying a new mother board (a pull).
Unfortunately there is no way to just snap it on, at least not that I have seen I really dont know in your case but If you want to fix it you will need to melt the lead (solder: silver stuff, not pure lead its some sort of mix) around the little prongs that are holding it on and pull off the old part. By the way you will need a soldering iron. Then you have to put the new part back in the old holes and apply more solder (you CAN NOT use the old stuff) to the prongs to secure it back on to the mother board. The lead conducts electricity (I think you know this already) so the lead can not cross any contacts or any thing like, that that will cause a short. You will have to go buy a solder sucker and solder wick to so you can remove the heated metal.
The problem in most cases is that there are too many components that are heat sensitive near the part and that soldering iron gets **** hot! find some one that will repair it.
All I have to say is if you are like me and you dont know what you are doing, DONT TRY IT. You will only rune your mother board.
But if it is an old lap top like mine a satellite pro from 1995 at 165Mhz and 32Mb of ram, and its broken then you have nothing to loose why not try it, whats the worst that could happen?
I hope I helped have a nice day!