If the robot does not turn on:
Check that the battery connectors are firmly attached
Check that the batteries are charged
Is there a clicking sound from the junction box when the power button is toggled? If there is, but the screen does not light up, there might be a problem with the screen. Contact serivce for further troubleshooting.
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Check battery cables and the orange cable between junction box and panel box for damages
If the robot does not turn off: