I have a good friend with a mamba max pro. When we plug it in and the ESC arms the lights flash green/yellow in rapidly and no power to the motor or response of any kind. Any and all suggestions are very welcomed!!

Flashing green/yellow is for low voltage cutoff. If you're running 2S, make sure it is set to that.

mine just did that tonight, plus it was beeping. I re-calibrated it to the radio and all is good....my servo would turn but no motor untill i did

Thanks fellas, come to find out he had two bad lipos, decided to check those just after I posted! Thanks to the great guys here in this hobby!