Make sure all the cables have been inserted into the corresponding socket of the integrated controller.
Once the machine is powered on, do not plug or unplug any cables unless otherwise instructed.
After you unlock with the safety key, if the indicator light of the work switch is flashing in red, you need to press and hold the work switch to unlock the machine.
After the machine is correctly unlocked and powered on, the laser module will emit a safe red crosshair.