Steve Kraus wrote in message ...
Sony KV-27EXR25, probably 14 or 15 years old. Back in 2004 I replaced a
failed regulator with help from this NG.

In the past few months I've been getting a loud buzz at certain instances
when there's some overly white video. Picture flops around a bit too.

It's directly on analog cable and I don't doubt that Comcast may
occasionally have signal levels that are out of spec but it doesn't seem to
bother other sets in the house including one that is a similar Sony, maybe
a few years older even. So I'm wondering if something is out of whack on
the TV. Is there a solution (besides the eventual upgrade to digital HD
flat screen)?

whites are saturating, this causes the buzz - adjust the AGC