Hi
Yesterday in the middle of job suddenly power of laser increase. Everything works fine just power was strange high . I was working with 19% power cardboard so current indicator shouldn't show more than 2mA but it was showing 10mA.
I tried to lower power to see the difference and on my surprise tube fire on only 2% which shouldn't do.
After few hours of checking and measuring the circuit and replacing power supply i found that problem was caused by loose connection of wire on high voltage trafo.
It was really frustrating since i wasn't able to find logical solution.
Check all connection on components to make sure that their aren't loose since it can fell of totally and get in touch with body of machine and expose you to high voltage.