I'm suspecting that its the display module (VFD) itself. More symptoms:

Dimmer will only go to 50% brightness. The control widget goes higher, but actual display brightness "stops" at 50%.

When fiddling with the dimmer settings, if I dim to 10% the "dots" disappear. Not get too dim, but actually disappear. Sometimes they stay gone at 20% too, sometimes not. Interesting. Not useful, but interesting :-)

I was wondering if PCA or anyone with more hardware experience than I has any thoughts? Is that VFD still available? Any ideas on the cost of the module or ballpark for repair? I'm thinking it might be cheaper or just as cheap to pick up a used empeg at this point. I know two people who have them and no longer have them installed in cars....

Jeff