Hello all, this is a bit of a tricky one. I have a Mac 550 here that thinks its temperature sensor is reading 185 Degrees Fahrenheit and therefore shutting off 7 seconds after lamp on. So far I've replaced the thermo-sensor, Thermo-switch, separated the feedback cables form the main power by the E-ballast, and changed out the circuit boards as well as cleared out any lamp hours and strikes from the memory of the fixture. Any thoughts?