I just got back from vacation and tried turning on my 400w HPS and the bulb bulb flashed a slight blue light and then nothing.. I've waited for 10 minutes and tried plugging it back in but to no avail. I also tried to plug it and leave it plugged in but nothing that way either.. Any suggestions? It worked fine before. Took the internals out and checked over loose wires or grounds. Everything seemed ok.
Problem solved. Left bulb off for about 2 hours and tried again into another plug and it worked fine.