Hello Kufi and zax,
:drowning:
First thanks for replying to my help cry
OK let's start the machine is an engraver & cutter laser, the machine won't start at all is completely dead, I cover the basics: there is power in the wall outlet, the machine's power cable is good, check the emo switch to make sure it was in the ON position including another switch that uses a key to close the circuit. There is no LED's ON, there is no alarm sound, there is water going through the laser tube and is not broken or cracked.
what else can I check??
the power supply is a switching power supply?
I have a voltmeter how can I check that there is output from the power supply?