Hi all

I've had a chinese 50w laser machine for a couple of months now.

Didn't use it much for the 1st month .. siting it, figuring the software etc..

Started using it and probably about 15hrs cutting so far.

Last week towards the end of a cut, the laser output stopped.

How can I find out if it's the tube or psu ?

Water protect light is working
there are no interlock cutouts on this machine
Test button on PSU does nothing
PSU fan works and power on led functions

I've done a test requested by the supplier where I take the psu output wires and wrap then round a dowel approx 3cm apart and hit the test button ... nothing .. they are expecting an arc

They asked me to open the PSU and photo and look for any burned components .. all looks clean


I've googled lots and can't find any way to determine if the PSU is ok without a working tube.

some suggest a resistor .. others say this is way dangerous !

Help please, before I have to buy a tube and psu to find out which is broke !

Thanks
Richard