Wrong move to mess with the pump diode just yet. 473 is not direct diode.
Usually when a laser does not start after setting its corrosion or a bad lytic cap.
First of all, check the fans, if any.
Next up, what do you have controlling it? Is the slide switch if installed set to CW?
Next up, a can of component cooler, chill the base of the laser head a bit and see if the power comes up. Dont get the component cooler on the optics, and keep the lid on the laser as the high speed gas flow creates static.
Check for broken connections, malfunctioning switches and what are the LEDs doing?
Since most lasers use labeled voltage regulators, are all the voltages there?
Steve
Qui habet Christos, habet Vitam!
I should have rented the space under my name for advertising.
When I still could have...