Eico 950B Voltages low no eye tube screen glow.

[SwizzyMan]

Hello all!

Yesterday I was testing a filter cap with my recently acquired Eico 950B. As I was lowering the voltage to discharge the cap I heard a pop and the screen on the eye tube flickered out. But, the filament on the eye tube is still glowing. I am now getting only 367 volts at the 500V range on the voltage dial and the eye tube screen still will not display anything. I am not sure what I did to make this happen. I made sure I was at the correct value, I was. Could this be a cap/resistor issue? Or an eye tube issue (note that the eye tube filament glows but no green screen).