I made the same mistake when I started with my machine (15 days ago)
I just pushed it a little and thought it was a test button?
The assembly instructions should say "Push hard, until you hear the "click" and hear the sound of the fan".
More tips if you're just starting out:
- To avoid making a hole in the table: first plug in the USB cable, wait until the green LEDs (on the nano card) stop flashing (3 sec), then turn on the card. Because as soon as the arduino nano starts (USB connection), it sends a pulse to the laser.
- To have a good cut, it is necessary not only to focus well (with the optics), but also to put at a good distance. Conduct tests. I found that my 5w is ideal around 7 cm
- To cut efficiently, the piece to be cut is raised by placing it on shims, so that at the end of the cut, the debris does not accumulate and leaves from below.
- A good desktop fan also speeds up the cutting process and protects the lens