Hey, hoping I can pick up some guidance from the knowledgeable folks on here. I recently picked up a pink label, square chip made in Taiwan Boss DD-3 off ebay for a great price. The pedal is in pretty decent condition but when engaged it's just making a constant clicking noise, sounds like a helicopter. I've tried it with batteries, power supplies, different guitars, leads no dice. Any ideas what this could be our should I look to return it?