This article addresses the issue of the laser tube not firing and is suitable for the following models:
✅ Pronto Series

Depending on the status of your machine, it may take about 30 to 60 minutes to complete the process.

Malfunction

⚠️ The laser tube fails to emit any beam.

If the tube fires but fails to leave a burn mark at the nozzle tip, misalignment is likely the cause. Follow the instructions here for adjustment. 

Steps to Take

1. Check the Laser Tube and PSU
Step 1: Open the back access door, and replace the laser tube if any of the following conditions are present:

• The laser tube is cracked.

• Water has entered the outer tube.

• The anode wire insulation is damaged.

Step 2: Open the left or right access door and check whether the laser power supply is energized. If not, see laser power supply indicator not lighting up for further steps.

2. Check the Power Rate

Article 1: Weaker performance Video 1: 45% pulse test Picture 1: The ammeter

3. Still No Fire, and Laser Signal Remains OFF

⚠️The laser tube still does not fire, and the ammeter laser signal remains OFF when pressing the pulse key during the 45% pulse test. ➡ Follow the flowchart below 👇 to troubleshoot.

Video 2: Replace mainboard Video 3: Replace PSU Picture 2: Short L & GND on the power supply

4. Still No Fire, but Laser Signal Changes to ON

⚠️ The laser tube still does not fire, but the ammeter laser signal changes to ON when pressing the pulse key during the 45% pulse test. ➡ Check the current value with the pressed pulse key.

• 1️⃣ Case 1: Current approximately 10mA, but still no fire ➡️ Replace laser tube

• 2️⃣ Case 2: Current always 0–1mA ➡ Follow the flowchart below 👇 to troubleshoot

Article 2: The ceramic resistor test Video 2: Replace mainboard Video 3: Replace PSU Picture 3 (left): The 6-pin terminal on PSU Picture 4 (middle): The test button on PSU Picture 5 (right): The IN & GND ports on PSU