You will likely have to send both the power supply and the Oppo back to Dan. When you unplug the
umbilical
and then re-plug. When the metal contacts make a connection when you plug it in, it will create a spark/short. That spark/inrush can damage something in the Oppo tube circuit as well. So, yeah, never a good idea to disconnect/connect live DC power cords on electronic equipment.
what did I do to my Oppo/Modwright UDP-205 ?
Like a real fool I unplugged my new umbilical cord I just got from wywires because I was hearing static (I thought it was the new cord) and then plugged it back in with the power supply still on! a few seconds later a loud pop and what looked like a flash, the Oppo still played so I thought I was safe but NO! now I am getting the same pop as the music plays what did I do?