Help needed 6550 15W

my 6550 15 Watt engraver was working fine on one side of my project then when I turned it over the laser lights up but wont engrave and also the gantry wont accept homing and runs the entire width and length, any ideas what the heck happened? any help will truly be appreciated.

OK - so the earlier models 6550 like yours do not support homing, as there are no limit switches for it to know when it reaches “home”; so that may be causing part of the problem.

If it has been acting erratically, I would first suggest checking the wiring harnesses to ensure that nothing has been knocked loose; and that the LED on top of the laser is blue - green is off.

If you can provide a little more info, that will help with troubleshooting