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My ballast is dual and a couple of weeks ago at I was using the MH setting I moved my ballast a couple of inches and that was it ! It stopped working, I changed the setting to HPS changed the bulb and it worked. So you think I may need to change the capacitor for the MH side of things ? If i...

Hi I'm having the same problem !! It works fine with my HPS lamp but when I change the switch to MH and put my MH lamp it just buzzes . I already changed the lamp and it didn't work with the new one either. It was working perfectly until I moved the ballast very gently and that was it ???