50W CO2 laser KL-460 from China problem

[vlado655]

Good day


I bought a laser from China and I have a small problem when we want to we gravýrovalo some text so the laser will work but the laser does not light up when you press the button for the test that will gravýrovať but we still have to hold the Test button, the order of someone?

See video


where I make mistakes?

Vlado

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