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UPDATE: JVC repair came today. Acknowledged the problem but said he couldn't give definitive diagnosis without getting it on the bench. He says he suspects the problem is the flyback. Took it to shop and said don't expect it back for at least 2 weeks because since it's a new model, he might not...

sure, 'cause to them it's the space shuttle. No such thing as a $0.35 part. I can't wait for the verdict.

Going to let JVC have a look-see and will report back on their conclusions. Could be something's not properly isolated back there and as the CRT reaches higher operating temps there's some interference. Kind of aggravating since, to paraphrase Ogden Nash, when the pictures good, it's VERY good...

Leo, I agree that it sounds internal. It takes approx. one hour of "off-time" for the image to restore to "normal" after which it begins dimming again after another 1-2 hours of use.

John, I had briefly considered that but the set is on a separate, conditioned line. I'm thinking it's somehow related to the unit heating up during normal operation - either the tube or the powersupply might be getting overheated? But the set is on an open shelf with plenty of circulating air...

Screen Problems on JVC i'Art Av-30W585 where after a few hours of operation, the image gets progressively darker. Anyone experienced this on CRT's before?