JVC AV-27432 strange noise pattern

[grossbard]

I don't suppose this problem could be due to any bad caps in the tuner or audio sections? because I didn't change those.

[old_tv_nut]

Originally Posted by grossbard

I don't suppose this problem could be due to any bad caps in the tuner or audio sections? because I didn't change those.

Showing up on the component input would indicate the tuner is not involved.

Also CAUTION! some switch-mode sets have a hot chassis or parts of the circuit that are hot, even though they may have a polarized power plug. Best to use an isolation transformer rather than risk your life.

[Ed in Tx]

I'd be going over every other electrolytic cap not already replaced, with my handy ESR meter. Or without that, dripping a tiny bit of freeze mist or liquid gas from a can of dusting 'air' upside down on each capacitor until I see a big change in that interference and find the culprit. Could be in system control or video circuitry. Just my 3¢.