Question about Sony BRAVIA KDL-40S2010 40 in. LCD Television

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The vizio light comes on as if the tv was turned on / the vizio light does not go dim to bright when the power switchis applied / tried changing power supply board / no change

Vizio 42 lcd

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  • Sony Master
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Frankly having it posted as a Sony does not help. Aside from changing a board you did not need to change what other simple steps have you taken? Vizio model number?

Some of the simple things (if you can see Vizio logo and it stays set is on) does it work via a DVD player etc, does it have audio etc.

It is here up to each expert to choose if they want to answer a question or not, with wrong model etc many may have just passed on your question.

If you get the Vizio logo and or OSD let us know that, the more clues the better.

My reaction would not be power supply but maybe just maybe a main board.

I would of course try other signal sources first, remove a cable or sat box and the set from power to see if things change or not.

Up to you how you word the question and what information you provide but up to us to decide if we want to try to help or not.

I personally answer over 400 questions a week so want to help if there is enough info for me do at least try to do so.

It says here zero views of this question which is why I took another look at it.

Posted on Dec 11, 2012

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This is a common problem with plasma tvs You did not mention whether you could generate any sound like through your dvd player or something like that. Whether you have audio or not makes a difference on which board may be causing you the problem. Just because it does not have a picture for tv viewing does not mean it won't produce some type of sound through your av1 input. Try it and I'll try to be more specific.

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SOURCE: Sony Bravia KDL-40S20L1 lcd tv has no power no lights nothing

My Sony Bravia LCD Model-KVL37S400A is not getting the Main Power supply. The LCD is not getting switched on. When i am trying to switch on the set nothing is happening.

Posted on Dec 24, 2010

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The power board is cooked. consider another tv.. Consider using surge protection in future.

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I type slow, I have a Vizio M261VP LCD TV, I purchased it not working. I purchased a new power supply. A light comes on and flashes in lower right hand corner. I t does not flash on and off it flashes...


Good day sir chris!!!!

Welcome in fixya and I'm happy to work with you...

OK lets proceed to your TV problem..

The possible problem is not the power supply...There some shorted parts on inverter board,T-con board or main board so that the power will not initialize due to that shorted problem..

I teach you how to find which board is shorted or cause of that fault..

Just follow this procedure below.
  1. Open the back cover
  2. Look at the inverter board..it is slim board that have small transformer on it.
  3. unplug the inverter board first.Then try to power it on...
  4. If the LED on front of TV will not flashes from bright to dim it means you have shorted inverter board try to replace it..
  5. If the flashes remain..go to next step..Power off tv then reconnect inverter board,after that unplug T-con board..Then power on.
  6. If the LED on front of TV will not flashes from bright to dim it means you have shorted T-con board try to replace it..
  7. If all those procedure done but still problem persisted the only problem is main board..Replacing main board will fix the problem..
NOTE: When unplugging and replacing of all board make it sure to memorize all connection or its better if you take a picture on it for future reference..

Hope this solution will be helpful..Any rate will much appreciated..

Thanks for using fixya..have a nice day!!

Mar 04, 2012 | Vizio M261VP 26" LCD TV

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Have a new 40'' Vizio VO400E LCD HDTV and randomly the brightness pulses for no reason when I'm watching TV. We have it hooked up to a Directv dvr.


check to see if your TV has an ambient light sensor that automatically changes the brightness of the TV based on the lighting conditions. Sometimes the sceen on the TV can impact the sensor and dim the TV for bright scenes. You should be able to disable this feature if you like.

Jan 02, 2010 | Televison & Video

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