Manual says I should only have have 210VDC present and voltage is varied by the brightness pot (RV503). Any adjustments made to the potentiometer makes no difference in voltage. The flyback hums normally and I do get static from the screen. I've already ordered a cap kit but the excess voltage on the neck board worries me, I'm hoping its only due to a bad cap(s) and not the high voltage regulator transistor. Has any anyone here experienced similar problems and what was the cause?