On Thursday, July 2, 2015, acgenerator@att.net [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
I finally got it fixed.
Here was the issue: apparently even though both both sets of boards were hooked up correctly to grounds used independently. They mismatched on the order of using the 4 ground connections.
One had Top-unsed-Chassis-Bottom; the other unused-Top-Chassis-Bottom across the ground posts.
thanks for those that helped getting me on the right track!