Ummm..... Laptop mobo's are custom items, available only from the manufacturer. And Dell has a bad, bad habit of doing things like rewiring standard connectors, so that if you try and use off the shelf, you wind up frying your system further. Plus there is absolutely no way to say that the motherboard is dead unless it was properly tested. What it actually sounds like is either a damaged GPU (video chip), or the memory associated with video is bad. Most laptops integrate the video chip into the board, primarily to force you to buy new kit if you need something 'upgraded'. Let a real geek take a look at it. 15 minutes with the Mark One Eyeball beats 5 hours of trying to explain things over the phone....