Unless you can do it yourself it will likely cost more to fix than you can buy a good second hand one/s for. I think there are some decent tutorials on youtube though. You will need a decent precision toolkit to get it open to diagnose. I picked up this one off ebay but haven't had a chance to work on the one I was planning to fix yet.
https://www.amazon.ca/gp/product/B01...?ie=UTF8&psc=1