As the tile says one com port, was using com3 and got a new smaller keyboard that is Bluetooth and that must have stolen com3 cause now can’t use laser, console says “waiting for Connection” I see new ports can be added but the software is trail only and nothing to say how much and I’m a cheap bugger 
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Any help people please funds are low… Merlin…
Power up all the hardware.
Launch LightBurn and see if it connects.
Open the Console window and the Laser window in LightBurn.
In the bottom middle box in the Laser Window you’ll see COM5 or something like that. If it’s not connected, click the button and see if the computer offers you another option to connect. If not, you should be able to Manually add the machine.
Please give that a try first.
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