Right-click the unknown device > Properties > Details tab > Hardware Ids dropdown. Note down the VID_XXXX&PID_XXXX . This is your key to the next method.
Run the installer (e.g., CH341SER.EXE ). For 64-bit Windows systems, ensure you use the of the driver. Click Install and wait for the confirmation message. seiki sk720t driver install
Navigate to File > Cut/Plot . Select the Seiki SK720T (or "20 tmpl" if the specific model isn't listed) and click Setup to assign the correct COM port. Right-click the unknown device > Properties > Details
I can provide tailored troubleshooting steps to get your machine running. Share public link Right-click the unknown device >