I can't find a local technician to work on my 50W laser engraver. San Diego area

I have a small unbranded 10 year old± engraver that I bought used. It was working perfectly then one day it stopped working. CloudRay was very helpful and sold me a ne Tube and power supply that matched my old set up. All the things that weren’t working, now work great (tube lights up, water pumps) and the beam in test mode works. However when I god to engrave wood using my software art files, the head tracks according to the software/art, but the beam does not fire. Again, it wll respond when I hit the test button. I live in the San Diego area but can’t seem to find anyone to work on it. Any ideas on what could be wrong and/or how should I go about finding a tech to analyze and fix it? Thank You!