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By "small box", do you mean the power supply itself, or do you mean the tiny plastic box that holds the ferrite cylinders that wrap around the power supply wire? I've only seen the tiny box thing on some power supplies.

I find it hard to imagine that the ferrite beads would be clicking... But anyway it's likely you have a bad power supply and need to get a new one.


Thanks Tony - looks like I should get a replacement. Unfortunately the Maplin link in that section of the FAQ (I'm UK-based) points to a discontinued product - has anybody successfully replaced the supply with an alternative in the UK? The supply that came with the empeg was made by Sunpower, model number MA15-150.