Best to recap after you get the HV up
Oil cap. Lift one end & try again. If its bad you will get a raster
but it will pulsate.
Sockets burn inside at focus pin. Almost a Zeniths from the 70's
use the same part but have different lead lengths & connectors.
Dont remember P# but format is 78-####-##.
Cant see the HV area but loosen the tripler & HV divider. Inspect
for cracks, bulging, discoloring etc.
try that
Zeno