i have a Taxi , that is having issues as well from battery corrosion . i have tried to clean it up with a dremel and a wire wheel .... it helped , but didn’t fix the problem . i have not sent the board off to be cleaned up ,instead i placed an order and am waiting on a rottendog board from Big Daddy enterprises . Been over a month now .... but i’ll wait . As with classic cars , keep the old part until the new repro part is installed and works ... then sell the old part or have it rebuilt and put it on the shelf or use it . just my 2 cents .