i had the bad motivator problem when he was standing up, then he wouldnt turn on at all. i wasnt about to let my robot be returned, i took off the leg plates and found the problem"
wire covering confetti spilled out of the leg plate, the part where the wire cluster for the right leg goes into the leg from the hip had the charictaristics of being mangled by a dog, minus the slobber. the bad chinese wire batch plus the constand rubbing if the leg plate had cause the wires to be exposed and crossed with each other, i fixed it by sealing each wire in electrical tape and binding the whole cluster in zip ties, and putting the leg back on, he worked perfectly.
i just thought id post this information because the "bad motivator" problem and the crusty wire insulation problems may be linked. as it was for me.