I am trying to debug a failed fluorescent light fixture. T8, 1x36W. I have checked the tube (vs. both a new one and a known working one), and this is not the problem. So I thought it must be the electronic ballast ("preheating start" type). What is confusing me though is that there is power both going into and out of the ballast (and also reaching the actual clamps for the tube light). So my question is: is it possible that the ballast is broken, but that there is still power coming out of it? By "power" I mean there is enough voltage across the output terminals of the ballast to light up a phase tester screwdriver. Thanks! PS. This setup does not have a separate starter.