JVC AV-27432 strange noise pattern

[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.