Lightburn will not connect to my yorahome laser says busy or not connected

i have the machine hooked up and the correct port marked but still no connection to laser please help newbie to lightburn. i have yorahome 6550 laser

How have you determined the correct port? Are you able to see the laser listed in Device Manager?

What version of Windows are you using? Versions older than W10 will likely require a driver.
CH341SER.EXE - 南京沁恒微电子股份有限公司 (

Some additional troubleshooting requests:

  1. Can you take a full screenshot of Lightburn?
  2. Can you go to Console window (enable in Windows menu if not available), power cycle your laser, then capture all the output and paste into a reply
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