Pixhawk PX4 arms but nothing happens after. Driving me nuts!!

I am using Mission Planner. The quadcopter will arm.There is power going to the motors via the positive and negative leads. I calibrated the ESC's one at a time using the remote & receiver. (ESC"S: Castle NO BEC 35 AMP 6S Lipo) After arming nothing happens. No beeps. Nada. Zilch. Zero. I broke my half an hour rule and put in about 2.5 hours. Starting to go crazy, LOL
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