Hello, I am experimenting a similar problem that seen in this topic
,but let me develope a little bit.
The situation is that I am refurbishing a K40 generic laser with safety switches, analog panel, lights, the usual stuff you should do when you buy one of these ( The laser was working when arrived). The LSPS was upgraded with a new RS507, 700V, 5A bridge rectifier according to the info found here
Everytime I try to fire it there is a spark precisely between the HV and the HV electrode, no current measurement detected on the analog meter. I have redone several times the joint but there is always a “bang”. I really refuse to believe that the PS has gone bad, LEDs are lit and voltage is detected between terminal ( motors move accordingly).
Does anyone have a suggestion about this matter?