Hi, my solution for this problem was to place a battery (empty or new) and the DC in started working again. I hope this can help you too.
Cheers,
Andrei Martinez Agras
Hi, I found how to make it work again. I had the same problem, I found that mine didn’t work with power supply but did good with batteries so I just place an empty +9v battery and the DC in started working as new. I hope this can help you and the 3 or 4 more similar cases out there.
Peace,
Andrei Martinez Agras