No sound could be the T.V. is switched on video input.
Check the two wire connectors in the pincushion correction
circuitry, & for a bad high voltage capacitor @ 400 volts, or
up to 1000 volts, depending on the unit. No horizontal drive
may be due to something bad further into the output stage, &
causing "shut down" of the drive signal from the "jungle IC".
Also check the horizontal drive coil. 75 volts is too low @ the
horizontal output, & MAY be the area to look for a "load" on
the output stage, could even be the flyback. Rono.