: Open the extracted folder and double-click the installer (e.g., lm390pc_setup.exe ).
: Obtain the ZIP file containing the driver and software from the Official MAX Support Extract & Install : Unzip the folder and run the letatwin lm-390a pc driver download
: Use your computer keyboard instead of the machine's smaller keypad. : Open the extracted folder and double-click the
If the file is a ZIP, right-click and select Extract All . letatwin lm-390a pc driver download
Launch the driver installer and follow the on-screen prompts. If Windows displays a security warning, select "Continue Anyway" "Install this driver software anyway" to proceed.
On the printer itself, navigate the menu to change the communication mode to "PC connection"