Get new batteries and make sure the charger is charging by checking the voltage at the charger port located under the front of the joystick. With the charger plugged in set a voltmeter to 200vdc and plug the leads into the two outter holes of the charger port. You should be reading 27-32 volts if the charger is working correctly. Without the charger plugged into the wall outlet you will be reading the battery voltage 25-27 volts fully charged Hope this helps you
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