Kevin, Thank you for your message. Unfortunately, this isn't something with a terribly straightforward solution. The repeated "clicking/clunking" sound typically indicates that the water flow actuators are not fully triggering, suggesting that problem could be electrical, either stemming from a bad CPU or a bad power board. In any case, this is something that could conceivably be undertaken, wouldn't be easy and could easily become expensive and/or prove futile. While I'm often the first to suggest opening things up and poking around, this is a case where a trained technician is best able to sort things out. Given the problem, I would advise sending this machine in for service at this time.