If it is the DAC, there is an easy cheap fix. There are many folks that have PWD MK2 digital and analog boards hanging around being used as door stops. They are left over from conversion to Directstream. I had a problem with my PWD MK2 and placed a WTB add. There is DIY video made by PS Audio on how to remove and replace the circuit cards. I think I paid $300 for the circuit cards, but since they are useless to their previous owners could likely get for less then the cost to ship your unit to PS Audio.