I would also appreciate if there are companies that fix issue like this. Thanks
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When you unplug the unit, do you press any buttons while unplugged? It helps to drain any stored capacitance by pushing buttons. That will help on the reboot process, but it sounds like you have a processor that is hanging up. I had a similar issue years ago with an MSD4 when I tried using it as an external DAC, and it tried to identify the incoming signal. I called McIntosh and they fixed it for free, and I had bought it used. I would start there.