2015 gem e4 no power

I have a 2015 Polaris gem e4 and have no power to the screen and cart will not drive. I have charged it and got the green light on the charger for complete charge also have 72v on the psdm any ideas on how to diagnose further? Cart was running fine until I went to get it off the charger and had no power

This sounds like your DC Converter may have given up. Your car needs 12v wake up when key is switched ON.

Try this → When Main Battery SwitchOn, KeyOff, Park Brake Down, Does the car still Steady Beep?
If Yes
—While beeping - KeyON - No change?