So, you can feel/hear static, deflection whine, etc. Just no neck glow? Are you sure you're getting high voltage, or maybe you're thinking of the degaussing noise when it's powered on? Disconnect the degaussing coil and power it up, see if you still hear the HV starting.
If you really are getting HV but no neck glow, it could be one of very few things - like a crack in the neckboard, or a broken wire for the filament connection, or a dirty tube socket.
Chances are, you're not getting HV, you only think you are, The monitor could be in HV shutdown, or have a blown HOT. Start by checking the B+ voltage.
-Ian