The computer is using an incorrect baud rate or an incompatible printer emulation driver.
Always attempt to download the driver directly from the manufacturer's official support page. Look for the "Downloads," "Support," or "Driver" section and search for "JK-5801H" or "58mm Thermal Printer Driver." 2. POS Software Vendors thermal printer jk-5801h driver
Download the JK-5801H driver ZIP file directly from Kinkon Support. The computer is using an incorrect baud rate
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