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Hello, So I have the Logitech Z506 Speaker System, and for whatever reason the sub emits a constant popping noise to any connected speaker when power is introduced regardless of input. I assume this is an issue in the power supply. How dangerous would this be to replace and what could I do and or use (maybe rubber gloves?) to lessen my chance of being shocked to death? The unit is rated 120V-240V 50/60Hz 800mA Thanks