I have the 1471 and feel your pain. I love my machine and would be sooo sad. Here's what I'd do. First, I'd follow the advice from those above and don't throw it out! Have you taken it in to see if it can be saved? Or, at least save it for a parts machine. Second, why don't you place an ad on Craigs List saying your looking for that specific model and see what happens? I'd only buy on ebay if the seller says the machine is in working order. So, if it's not you can return it. Stay away from those that state 'as is' or 'I don't know how to sew'.
Personally, I wouldn't touch the mother board or components at all. Unless you're wearing anti-static gear, you can fry it in a second. Save that for a professional. Good luck!