I've been having some sound/music issues with my taxi. U-4,19,21,and 22 are new from johnwartjr(great service and prices). No difference, and then I saw the corrosion. I replaced the battery holder this past spring, and that wasn't there. I guess there was leakage, but no corrosion yet. It should have been cleaned at the time.
I am confident that I can desolder the chip and clean the board and chip, and get it put back. Does the chip need to be replaced? What are the odds that there is damage to the traces? Or should I just send it to Rob, or Clive?