ummm, You lost me at inverter stage.... I'm not very knowledgeable on the names of parts, most of what I know is how to check for out of tolorence resistors, bad solder joints, and failed capacitors, I can also look and see if a part or something is obviously burnt cracked or otherwise broken and look it up on the schematic and replace it if available...
EDIT: This monitor is not a multi-sync (I wish they were) it's a IBM 5154 EGA, Also I don't have a scope I really need one but I just haven't got one yet. Also I don't have a schematic for this monitor but I will look and see if I can find any parts with a green arrow pointing to them...