Ice Power 200 ASC & 200 AC Buzzing noise

Hey guys,

i have blown my icepower modules. I have 2 x 200 AC modules powering each one 200ACS module. Tinkering around I accidentally shortened the housing of my DSP to the 47V loop output of one of the 200 AC modules. The resulted in a spark and now all my modules are buzzing when I have a source connected. If there is no source connected I have normal background noise but as soon as I connect a source, even without a signal the start buzzing quiet loud. I can play music through them that is not distorted.

Since I connected my DSP to the 47V I suppose the 47V on the GND line of the ice power modules destroyed some resistors. Unfortunately I con't see any defect parts on the modules.

Anyone any Ideas?

Kind regards