Hi there!
If the PC repair shop has some normal people woking there they should be more than pleased to help you out with the SAM module. Not saying that they will fix it 100% but they at least can tell if the module is repairable. But if some water got in there that should just be a matter of soldering, cleaning and testing. I work in a PC repair shop and we do those kinds of things as well. Mainly because I have a car electric diploma :D!
Hope this helps!