I did the same thing in Feb of last year, and documented my trials and tribulations in this post. Well, ain’t that a &!$@# - Community Laser Talk - LightBurn Software Forum. Most of the issues I had were caused by the fact that I had an early version of the OLM2P (S1) and the adaptor was expecting an S2. I ended up putting Ortur’s OUC V2 on a shelf and designed my own. This allowed me to use a separate power supply for the 10W module (using the 24V from the controller to activate a relay to supply laser power). If your original 5.5W is no longer working, I would grab a Volt/Ohm meter and do some checking. If you don’t have one now is as good a time as any to get one. All in all, I’m happy with the upgrade. Hopefully you haven’t fried something and you can get it up and running.