500x, only charges via usb-c

as the title says, the banks will no longer take juice from the input jacks, front nor rear.
I know its not the adapter as it works fine on my other battery bank.

have tried: three button reset, two button reset, opening and disconnecting the red and black connectors to reset the BMS. but no change.
have been stored indoors out of the heat

just inconvenient as now I can't easily charge them off solar