Can't burn slate coasters

I have a NEJE 30W module on a LM2 frame. I use to be able to etch slate coasters but as of late I won’t. I tried all kinds of setteings up to 100% and 400mm speed. Do you tbhing its the module. I got it about 5 monts ago. Is there a warranty on the NEJE module?

Don’t know your module, I have a Neje for a couple years. I understand the company is very supportive, so I’d give it a shot to see if they will give you any kind of warranty on it.

You might check it out and ensure nothing in the lens or head has become loose and you have lost focus or some other mechanical issue.

Good luck…