Laser cutter lost power!

[Sophia9187]

Hi all,
I have a hpc ls3020 laser cutter. It has recently stopped working. It had been cutting fine and then 3/4 of the way through a cut the laser stopped working. Everything else is working fine (lights on, air pump running, moving etc.)
Any ideas if this is the tube- or could it be another issue?
Does anyone know if the tubes in a hpc laser are the same as what you might buy for a Chinese laser?
Thanks

[RichardKl]

Hello！
In my opinion ，the problems is lasertube！
when did you buy the machine?