Patchy / Uneven Engraving on new machine.. Settings or hardware issue? Anyone seen this before?

There’s some discussion on the forums about changing freqs for various materials, but yeah, I haven’t changed any frequency settings. This machine is brand new, and just installed the device to lightburn last week. This its first runs, and getting some strange results. Mostly bad… somehow it did decent cut lines and raster engravings, but now it’s just spitting laser power… almost looks like a dotted line. I can’t even get the laser to burn masking tape over mirror #3 when I put the laser head more than halfway on the bed to the right or bottom.