Additionally, I know, this sounds ridiculous, but double check all cable connections. The fact that the fan turns on but the laser doesn’t fire could mean a loose cable to to the laser module…or even a spliced cable along the path (so checking for continuity could also help).
I usually just CAREFULLY disconnect and then return next each cable harness starting at the motherboard as a first diagnostic. It has fixed two issues I experienced with excessive vibrations so it is now my go-to.
Are you able to see the laser beam using the “fire” button? (Check YouTube for how to activate this option if you don’t k ow about it). I’d working, this would address any cable issues to the laser module.
There is always the chance that the laser module is DOA, but that is more of a question for Ortur Tech (can try the Facebook group) if it isn’t resolved here.
Best of luck!
P.S. this is also going to sound REALLY basic, but is your output turned “on” (green) in the Lightburn cut list? I suspect “yes”, but, if not, home would work great and the software would think you framed everything you wanted (since nothing would be “on” to frame in the first place) thereby giving you the successful status report even though it seemingly did nothing.