It is doable, but in most cases unless you are good with a soldering iron I would just replace the motherboard itself. MUCH easier. If you want to replace the DC jack you should get the model number of yours (should be written on the component somewhere when you have taken out the motherboard and can get a complete look at it) and search around on a site such as ebay for the correct one. Make sure it is the EXACT model. Again motherboards run pretty cheap online from $20 and up so I really strongly suggest you go that route instead.