Hello we have a laser pro which is engraving but not cutting ??

I have tried the set up of 2D design all ok
cleaned mirrors all over
turned all sorts of different levels on red to cut
ONLY WAY IT WILL CUT is on 0.1 power 100 and no PPI set to X

It eventually cuts but too slow

Before auto focus broke no got a brand new one it cut fine on 1.3 red 100 poer and pp1 400

BUT NOW WONT CUT ONLY ON 0.1

Is it the laser going ?

Help