-- >i will shock
Don't spend time with the old board.
Buy one alltek board to replace definitely the bug . After 4 classic Stern, and 3 bally's , i have decided to stop fixing, waiting long hours to replace sockets, chips , reset circuit or connectors.
http://www.allteksystems.com/products-mpu-replacements.html
I agree it's not a purist-method but it"s efficient.
(just ordered 2 pieces)
Let us know the result.
Lionel