Please describe your problem to us and provide a video or photo. That's can help us to judge the issue easily.
Video or photo must show the problem clearly.
If you don't know how to display it by video, you can please contact us: tech@thunderlaser.com , we'll help you to judge.
If the the laser tube is came with the machine, please give us the serial number of your machine.
If you purchased the laser tube from us separately, please tell us when you purchased it and the invoice number.
Thank you for your cooperation in advance.
SPT:
Break the glass tube, put the metal head and the label together to take a picture
RECI:
The number on metal head and the label must be clearly.