My primal x3 worked perfect last week. Today I turned it on and the powersupply that was replaced 3 months ago by maytronics seems to work fine, however the robot does not move. Completely dead. I checked the output of the powersupply and am getting 29.1 volts. Cable looks fine. Am I assuming its a dead motor? I just would like to confirm as I've never been thrilled with this robot anyway, so if the motors dead, I'll buy something else before bothering to repair.