Struggled getting my shows stable, tracked it down to the jacks. Looking inside the female jacks, they have turned black. Lucky I had a spare hub. They must be silver plated.Thinking about using either corrosion X or dielectric silicone grease to keep them from oxidizing. The other interesting note is that the male jacks are gold plated and they are perfect being no corrosion. I wonder if it would help the cause to change the female jacks and new builds over to gold plated.
Jess