I have a MiniMax NT TSI gas heater, HTR-400-NT-STD-PH. It was installed August 2005. On the DDTC, only the power and pressure sw led's work. The SPA light is also lit up. Everything else is blank and not responding to inputs. I reset the circuit breaker. No luck. Any other ideas or suggestions for trouble shooting? Am I in need if a new DDTC?

Thanks.