Connect the printer to the local network via an RJ45 Ethernet cable.
Debris on the printhead or dead pixels/elements on the thermal heating element.
: For developers sending raw ESC/POS commands, enable the HEX option to transmit data exactly as entered.
Close other POS programs. Check Windows Device Manager for the correct COM/USB port number. Incorrect Baud Rate or mismatched Encoding.
Clean the printhead with an isopropyl alcohol swab. Replace the printhead if lines persist.
Connect the printer to the local network via an RJ45 Ethernet cable.
Debris on the printhead or dead pixels/elements on the thermal heating element. Pos Printer Test V3.2
: For developers sending raw ESC/POS commands, enable the HEX option to transmit data exactly as entered. Connect the printer to the local network via
Close other POS programs. Check Windows Device Manager for the correct COM/USB port number. Incorrect Baud Rate or mismatched Encoding. Pos Printer Test V3.2
Clean the printhead with an isopropyl alcohol swab. Replace the printhead if lines persist.