You say you are 'cheaper' and can't afford a new one, then Hey, even if you can't tell the difference between screw drivers, just wade in like Evie suggest and attempt to fix.
As a kid, I used to take broken alarm clocks apart attempting to fix, but never did fix. I still attempt to fix almost everything that breaks, qualified or not...me also 'cheaper'. Trial & error works fine. Sometimes just banging works..like my 19'' PC monitor needs to be slapped every so often when a short acts up. I can't think of any kind of mechanical/electrical thing around the house or garage that I haven't tried to fix. Wife bought me those "Time" fixit and other books, and is always bringing me 'How to do' pamphlets from Builders Square. Usually have about 70% success. Bought the Chilton repair books for my auto & truck, doing the easy stuff, even replacing brakes, rotors, tie rods, etc..
Fixing all relatives Computers and 3 of my own...self taught with the PC for Dummies book and watching/reading the ZDNet/CNet 'Help' forums, only asking 2-3 questions in 7 years.
So, unplug that broken scanner then plug back in...that works on a lot of things, even a PC....something like doing a reboot will restore resources with my Win98, and many times will cure a slight problem with my WinXP and WinMe PC's. Wear rubber gloves when inside the scanner and it is plugged in, along with the wife standing next to the fuse box.;-)