Re: 4200 Excavator problems
			 
			 
			
		
		
		
			
			I would systematically unplug servos, turn on check, I had similar and a cooked servo was the reason. Also do track esc and pump esc. One at a time. And also make sure battery is good, but I would bet it is a bad servo giving electrical interference feedback.
		 
		
		
		
		
		
		
			
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