G'day guys,
I can confirm that replacing the CRPB board has solved my boot up problem as I managed to get a tech to test the machine with his test board and it worked.
The tech advised I could find one online or perhaps have my original board repaired.
Does anyone know of a good second hand source for these boards or their refurbishment?
Part number is OPUS 5000-II CRPB-II, 1911-164-2 (but the test board 164-1 worked but tech said may be missing some features)