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My son returned home from the Air Force last year with a JVC AV-65WP74, which he purcased at his BX. Was told that large screen TVs purchased at the BX were covered by a 90 day warranty. After 6 months the TV started to shut off after a few hours, with the blue power light blinking. My son contacted JVC and was told that since there was no JVC service rep in Germany, there was nothing they could do for him. I had him put a fan behind the TV when it was on and this helped but after 5 or 6 hours it would shut off again. It's been home for a year now and only gets turned on for a few hours each evening and will now shut off after about 3 to 3 1/2 hours even with the fan running behind it. Could you please advise me on how to resolve this issue. This was $2800 to purchase and less than 2 years later it appears as if it's going to cost him even more.
Although I am not acquaint with that particular TV, as an engineer (non JVC) I can say that what you describe is a clear cut case of what would suggest an intermittent heat related problem cropping up in the internal circuitry which is causing the power supply to shut down into its standby state for protection purposes. (i.e: the power light blinking) If you keep using the set whilst being aware that a problem exists, the shut down circuit "may" fail at some point resulting in component damage, and so you dont really have any option but to have this checked out by a technician experienced in working with large projection TV sets. (Possibly a strongly worded letter to JVC customer services detailing the circumstances "may" bring results like a subsidised repair?)