Hello all.
My laser machine started arcing when its engraving. I observed it was arcing at the power supply unit especially when i press the test fire button and the power is set above 50%. I have read suggestions on this forum but my problem is that this laser machine does not have an ammeter where i could see how much mA the PSU is outputting. Now when i press the test fire button the laser tube remains idle, there is no purple light on it but there is a hiss sound on the power supply.
Please could anyone advice me on what to do??
Attached various shots of the power supply unit.