Rehoused Line 6 Echo Park/Noise issue - Dock PCB issue?

[beedoola]

I rehoused my Echo Park. I should have taken a picture before something went wrong. It worked fine but after I unplugged the cables to move it around, I got a loud buzzing that continues to persist, even after removing the guts out and checking connections.

I get a loud buzz/hum, even if I do not have the Input jack plugged in (pedal isn't powered at that point). If I have the DC power hooked up and the output jack connected, the buzzing is there. If I plug in the Input jack, same thing. No sound passes through. All the solder connections seem good.

I'm measuring 2v DC at the Tip of the Output jacks - is that normal?

I mistakenly had the polarity of the power supply reversed when I first wired the DC jack up - I desoldered the stock jack to add a barrel jack for use with the new enclosure.

I'm guessing that could have damaged something but once I wired the jack correctly, the pedal worked fine. The issue started to occur later.

Any debugging tips?

Here are some gut shots.

[Mark Hammer]

Are you sure the new chassis is heavy enough? I understand it needs to weigh at least 2lbs for optimum signal integrity.