High current draw like that sounds like a bad analog issue. But for all to have the same problem that is strange. I have three pluses and the power connector to analog board will draw and sometimes crack the so.der and has to be resoldered. The C1 is common but with a bright clear screen I would pull the plastic cover on the analog and look at the power connector back sides. As for all of them doing it try the units in different plugs as once the breaker was tripped it can take hours before its not easily trip able by any real load, especially if you don't have ground fault plugs with the resets.

I hope this info made sense and helps you.