EB3A SHORT on DC, unresponsive

EB3A running a small fridge, successfully for a week with solar or auto 12v charging source. Overnight it discharged completely running the fridge, but shows 100% full charge. The “SOS” light won’t come on, the battery is dead. It will not take a charge from solar or grid. DC when activated, shows SHORT. Disconnect everything, tried to restart with AC grid power, still shows 100% and won’t accept a charge. When DC is activated, flashing red SHORT appears. I emailed customer support. Awaiting response. has anyone found a solution to clearing the short?

@DaveP It seems that the control board is broken. Please contact support for repair or replacement.

Thanks you. I’m in contact with customer service for a return