Hey guys need some help here and keep in mind I'm new to this so treat me like child lol. So this is a 40w chinese laser had it around 3 months here's the issue I was in the middle of cutting out some stencils and it seemed to not be cutting as strong as it should then suddenly it just quit period the machine just kept running it's cycle. If I drop the power below 25% the laser will light up but won't shoot thru the mirrors if I move the power higher it just doesn't do a thing when the test button is pushed. I'd really appreciate any help thanks.