Ya know, I'm an enthusiastic builder, but not always the best diagnostic tech, but I just fixed a pair of consecutive serial number DBX 160 VUs I had on my bench. They will return to service this week.
I have a pair I want to unload that are known to have issue. One side is wonky and the other side works but the metering is wonky. What was happening for this pair.
I don't normally do this, but the things that were wrong with this one can be checked by anyone. Shaky solder joints that need to be reflowed, and checking and cleaning the molex connectors and tightening the female pins.