I have the older DT52 model. Problem being, It turns on and functions as per normal during first 30 seconds of initial startup. Then Automatically turns off?? I turn it back on and same thing it will only stay on for approx 30 seconds. I do not believe this model has a internal battery as I have tried taking it apart before and cannot find a battery? Any tips??? Sometimes it flashes LC or something rather I figured this could either mean Low Cell or Low Coolant. Also where can i purchase new stinger probes for this unit?