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It turns on alright,Within a minute or so the the picture goes

It all turns on alright.within a minute or so the picture goes right down to nearly a blank dark screen,you can just see it really close up there and theres still volume.

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The rear panel lamps are shutting down, This is beginning to become a common problem. These lamps are operated by an electronic circuit which can fail, It sounds like it`s this panel that is failing on your set. I`ve had a few of these go down on me. It means taking it to an engineer I`m affraid, These lamps aren`t ordinary lamps as they run on high voltages, a bit like flourescent tubes but a lot smaller, so there`s nothing that the consumer can repair or service. I`m sorry to be the giver of bad news. Ian

Posted on Jul 24, 2009

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Posted on Jan 02, 2017

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Why does my flat screen panasonic lose picture and sound within a minute of turn on?


The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

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It seems that the temp more often goes up to 20-30's and that food is not as frozen when I check it. When temp goes up I check it for next couple of minutes and usually within 10 min the temp is back down...


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Picture goes out right after turning on, have to


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