Laser Engraver Forum

hi guys. had an eBay laser engraver for a while with no issues until one day it stopped working. I have replaced both power packs. main board and display.
there is power getting to internal light, fan and work bed moves up and down. the lights are on both power packs but not y and x axis boxes.
I've had an electrician check there are no broken wires and no breaks in circuits. not sure what to do now.
display has no power