I got everything back together and then when I powered up (via isolated variac and dim bulb tester) the unit did not power on at all. I removed the base cover and tested the voltage across the power switch, there was full voltage supply (blue/brown wires in pic below) but zero voltage on the white/grey & brown when the switch is in the on position. It did power before the refurb and the switch has not been touched during the refurb. I notice that the wiring on this 4400 type 2417 is very different from the type 2419. Any ideas about what may have gone wrong or has the switch just failed?
