My Pod X3 live has developed a ground hum which Is constant when plugged in. The ground lift switch does nothing to fix the issue. I am having this issue both at home, as well as if I take it out to play. I have acquired great cables, ensured the power has good ground and not on a noisy circuit. I can unplug the input cable and have volume at zero and still get the 60Hz hum on the output. Its on both LowZ and High Z outputs (left and right for each). The power supply is the stock unit that came with the system. Could it be the power supply needs to be replaced or is this an internal issue where a ground wire, solder joint, or other component which isolates ground has failed?
