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Why doe's my sanyo 50'' plasma tv turns itself off

When i power on my tv it shuts down the first time after the picture flash on for a sec, then it turn itself on and off several times.

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You have a fault on your HV switching supply Board and/or your Vertical or Horizontal control boards. The stk 917-811A x2 (Power Modules) of them could be Faulty. You need to take your set to a Professional Tech. work shop. The cause normally is Mains Voltage surges and erratic mains supply inputs.

Posted on Jul 06, 2014

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Posted on Jan 02, 2017

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SOURCE: Panasonic Viera TH-42PV7HS Plasma keeps shutting down

Hi to all, My 42" Panasonic plasma have the same problem. It turned itself off and now red light flashes 7 times, than after short pause 7 times again. And so on. Any ideas what is wrong??

Posted on Oct 23, 2008

  • 2 Answers

SOURCE: Magnavox 50" plasma Won't Power on/Shut's off/Blinking red LED

The above fix, listed by Tom saved us!! We did as instructed and took off the back of our 50 inch Magnavox plasma tv. We were not sure what we were looking for so we googled capacitator (image) & there was a photo of a fried capacitator! Sure enough we noticed ours were "fried", we took out the board and went to an electronic supply store, bought the 2 capacitators ($2.00 each!!) and then found someone who did tv repair to sauter the new capacitators onto the board. (It is important someone who know how to sauter and recognizes polarity do do this for you) All in all we fixed this following the above instructions for $34.00 and our time. For a month we were told to spend hundreds getting a new power board!
Kudos to you Tom & thanks so much!!

Posted on Feb 02, 2009

orionsecurit
  • 2 Answers

SOURCE: My hitachi plasma tv model: p55t551 every time i

turn tv on the red power light comes on then goes off again

Posted on Jul 08, 2010

  • 1 Answer

SOURCE: I have a panasonic plasma tv. Model #

I don't know but I'm having a similar problem. I have a plasma
TH-50PZ77U. It will run for a while and then shuts off. Also, the volume goes up and up and then it shuts off at times. Like I have a ghost here. I had both of my sat. recievers replaced. It seems to get worse over time with shut down. I called panasonic and they had no info and denied this was an issue but I beg to differ from my research here online. It's only a few years and we paid lots of $$$. They gave me a # for service 1 hour away!

Posted on Jul 11, 2010

  • 8457 Answers

SOURCE: 50" lg plasma tv when i turn it on it shuts down

The power supply board have problems,it not giving the tv the right votage anymore.That why it shutting down,not sustancening power to the tv anymore.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power board for the replacement.

Posted on Oct 16, 2010

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1 Answer

Sanyo dp50747


sounds like a mainboard problem

Jan 31, 2013 | Sanyo DP50747 50 in. Plasma TV

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Why is my 50 inch sanyo plasma power up with no picture then shutting down after a few seconds


A component in the TV is failing and is not receiving correct voltage, which is causing the TV to enter " protection mode" and shut off. Could be any part of the TV but I would start with the power supply and go from there.

For more info post the model number of your TV

Here is some basic info on testing the power supply.
TV Power supply general info

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Have a sanyo 50" plasma


This tv problems are related to powering up the tv and sustancening the tv power source to the tv itself.Replaced the tv sub power supply board where the a/c power cord plug into it.Try website like Ebay.com to buy a whole new refurbish sub power supply board for the replacement.

Sep 06, 2011 | Sanyo DP50747 50 in. Plasma TV

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50" lg plasma tv when i turn it on it shuts down in a few sec after doing this several times it will eventually stay on what can i do


The power supply board have problems,it not giving the tv the right votage anymore.That why it shutting down,not sustancening power to the tv anymore.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power board for the replacement.

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2 Answers

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You probably have blown capacitors on the PSB-power supply board. Recaping with new UF caps works 90% of the time. The set turns itself of into a fault protection to keep from damaging more components internally. A few bucks a soldering iron some solder should do the trick.

Jun 29, 2010 | Sanyo DP50747 50 in. Plasma TV

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5 Answers

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did u cheak the input cables does it do it on dvd input as well as others ?

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3 Answers

Panasonic 50 inch Plasma


it could have over heated you can try to reset it first unplug it for about five minutes and try to turn it on if that dont work the remote might have a set button try holding that down until the red light flashes twice, then turn it on if not then hold the power button down on the set for a good five seconds to see if that resets it. if none of that works you will have to go to panasonic .com for the reset instructions.with the red light blinking the power supply is most likely good you just need to reset i.

Dec 24, 2007 | Panasonic TH-42PD50U 42 in. Plasma EDTV

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