Most of the problems of a wet PCB and electronic parts come from the "mud" left behind. These often invisible deposits can cause short circuits. I had a similar problem a while back involving an old radio that had been left in a humid garage for years. I used an "electronics wash" that was just flooded over the parts (outside the house) and left to dry. It essentially washed off the electronic parts without harming them. I believe a current product is "Electro-Wash" produced by Chemtronics. If you can't find a local distributor, you can order it by mail from Altex Electronics in San Antonio, TX (www.altex.com) Dunno about the mold... perhaps the wash will take care of it too.