I have a Fox Alien 4040 that has been working great on Lightburn for the past 3 months since I got it. I’m new to this whole thing but have learned alot in the past couple months. I got home today to continue doing some work and the laser would not accept commands from my computer.
It had started over the past couple projects to stop randomly in the middle of a sketch and i would have to restart the sketch. Now it will not even show up in Lightburn and I’m not sure what to do. I have restarted both my laptop and the engraver. Cleaned all the hardware (it was dusty on the computer module. Checked all connections and they are clean.
All I get in Lightburn is “Waiting for Connection” and before I restarted it would say something like “(”$" for help)
Any help would be much appreciated, trying to finishing our wedding invitation 
Update:
Trying again this morning and i got it to trace but then went back to doing the same thing.
When i try and send a job to the laser it either do not respond at all, says “GRBL 1.1h [’$” for help] or a pop up comes up saying “There was a problem sending data to the laser. The machine may be busy or paused.”