Question about Samsung HP-R5072 50 in. Plasma HDTV

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Samsung Plasma TV

We came back after a week vacation. When we turn on th eTV, it goes off and on every few seconds by itself. Does anyone know why?

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It related Power board or Y-main board problem.
You need to replace one of aboves.

Posted on Feb 24, 2009

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This is not good. Was your tv unplugged or just power button off when you left for vacation. PlasmaTvs are highly susceptible to damage from power surges caused by lighting. Leave unplugged for at least five minutes then plug back in and see if this helps.

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It's definitely an overheating problem if your plasma turns off by itself after a while. I would suggest to place a cooling fan near the back of it as a temporary fix.
There could be a power supply issue along with a Ysustainer board but in order to know that for sure, you should use a hair drier and blow hot air to the power supply and see if the TV turns off, if the time that the tv turns off is shorter when blowing hot air to the power supply; then is the power supply issue.
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Well, first your model number is the 42 inch, but I digress...

I had a similar problem with a Viewsonic 27 inch, with the blinking power light on a failed power-up. It turned out that replacing the power transformer was the ticket. However, as I have the 50 inch Panasonic plasma, I know that the transformer is built into the set itself. I'd still suggest that this is what needs replacing though, as this is different from a set being on but having no picture.

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BY UNPLUGGING YOU RESET THE TV. SOUNDS LIKE IT IS GOING INTO A PROTECT MODE IF THE STNDBY LIGHT IN FRONT IS NOT FLASHING ITS PROBABLY A POWER SUPPLY PROBLEM IF IT IS COUNT HOW MANY FLASHES THAT WILL BE AN ERROR CODE

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You have a power supply fault or one of the drive boards that drive the plasma screen is loading down the power supply. This power supply may be part of the entire main board. Good Luck

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