Hi, I bought an used K40 laser cutter and the owner saw that the co2 tube has two years and need to be replaced.... I can cut (in 2 or 3 steps) 4 mm acrylic... I can engrave, can cut paper, engrave acrylic.... my question is...

The power supply has a noise when co2 tube ON but no always... but almost time... sometimes noise, sometimes no noise....

Here is a demo video of the power supply noise, I opened the power supply and capacitors are not inflated and board looks good.

https://www.youtube.com/watch?v=PyFmPb_lIM4

Can the noise be generated by a wasted co2 tube or can be the power supply damaged?

Thanks in advance!!