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Posted on Jul 24, 2009
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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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  • Expert 123 Answers
  • Posted on Jul 24, 2009
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Joined: Feb 19, 2008
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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

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1answer

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...

This is normal. All commercfial freezers must defrost 3 to 5 times a day, or they will freeze over at the coil and then stop freezing. A timer in your freezer turns off the compressor and turns a heating element on for 10 to 15 minutes. During that time the coil heats and melts frost from the coil. Usually within 30 minutes the temperature will briefly rise to 20 t0 25 degrees F and then quickly drop down to 0 degrees F. The food rarely defrosts in this short period of time..
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Picture goes out right after turning on, have to

My 3 year old Sharp LC-40C32U would start up fine but within a minute would go dark (audio continued fine). For a while I could turn the set off and on again and it would be fine, but over time this became less effective. My solution, which has worked for a week now, was to a) unplug the set's power cord; b) after 3 minutes plug it back in and turn the set on; c) on the remote hit MENU and slide over to SETUP (3 clicks to the right if the screen is dark) and one up to RESET; d) hit ENTER and follow the prompts. This puts the set in it's factory configuration so you will have to rescan for channels. Worked for me.
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TV Picture problems

My samsung did the same thing right before my color wheel went out. Can't be sure but that is what was wrong with mine. hope this helps.
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Nokia 2630 gets switched off within two or three seconds once it gets started

operating system of ur phone is corrupted. go nearest nokia care or any repair shop near you ask them to change its software once it will be changed ur phone will be alright
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Canon XL1s Viewfinder image gone

yeah, it sounds like the LCD has cracked at the bottom, or something. Since there is no pressure holding the liquid in the right place, it all settles at the bottom. (Hence the paint running down wall effect) soory to hear this dude :(
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Intermittent loss of picture

You'll have to locate the vertical output IC which should be mounted onto a heatsink, then take out a good magnifier under the printed circuit board and examine the solder connections on the pins of that IC and resolder the ones that are cracked.
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