Faulty Williams Pinball Machine WPC Power Driver Board Spares Or Repairs

  

Terminator 2 Williams power driver board For spares or Repairs. The 20v on this board is not working and reading 0.05v from the test point. The board has GI damage from oxidation. It looks like someone has done previous repairs but relating to a couple of chips. It could a dry joint or the BR4 being bad according to many many hours of research.