Reason: The power cord is incorrectly inserted.Method: Check the power cord is correctly inserted into printer, power adapter, and power socket or not. Check if the printer is powered on.
Method 1: Check whether the self-test is normal. If not, please contact the dealer or technical service personnel;Method: If the self-test is normal, check the connection of the data cable. Make sure the data cable is properly connected between the printer and the computer. The data transfer settings between the printer and the computer need to be consistent.
Reason: Printer and computer baud rates do not matchMethod: keep the device and printer baud rate consistent1.Print the self-test page to confirm the printer baud rate, please check "serial config”2.Change the serial port baud rate of the computer: control panel - view devices and printers - right click on the printer - printer properties - port - configure the port - modify the baud rate - apply - OK.
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