Try a different USB port. Ensure the printer is set as the "Default Printer".
Connecting multiple printers or connecting one printer to multiple terminals via a network. Wireless printing from tablets, smartphones, or laptops. Serial (COM) Older POS systems requiring specialized interface. Troubleshooting Common JP-80H Driver Issues jp-80h driver
Because it supports standard ESC/POS commands , it is famously "plug-and-play". Try a different USB port