Question about Sony BRAVIA KLV-S40A10 40 in. HD-Ready LCD Television

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I have a Sony KLV-S40A10 LCD TV. The picture is black but the audio works fine. The back light comes on as well as the green light. I have tried from the cable box as well as the dvd player. I have checked the power save options and the tv is on. I have unplugged it and tried again and no change. Is it possible the lcd screen has failed?

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It's much more likely a fuse has blown to the video processor board, or a cable is loose going from the video board to the LCD panel, or a cold solder joint on either end of that cables' connectors, or the most likely answer is a leaky or blown capacitor in the power supply section.
Any caps in these (or any) sections that look bulged at the top, or bulged/leaking at the bottom need to be replaced.
If you repeatedly turn it off and on, eventually it'll probably come on and display video, but every time you turn it off, the TV will get harder and harder to start up until one day it just won't.
Sometimes you have to do the opposite to start it up and unplug it for 5 mins, then try.

If you aren't tech savvy, don't worry, read the rest of this and watch the videos.

If you are handy with a soldering iron, an inexpensive handful of capacitors will likely fix you right up.
Match the capacitance on the capacitors. Go over voltage if you can, and still have them fit.
IE - it's not a bad idea to replace a 10V cap with a 16V or 25V or even a 50V, but don't replace a 680uF cap with a 500uF or a 1000uF (unless you are positive it's only doing ripple filtering, and even then, you should go OVER, not under the uF rating).

Most of the caps that go are 10V 1000uF or 3300uF.

I found some great videos of the procedure (for many Samsungs with the same issue) on youtube.
http://www.youtube.com/watch?v=Mm51C_RDIZE
http://www.youtube.com/watch?v=BNHHrgX_6cs&feature=related
http://www.youtube.com/watch?v=8l0AUj8QUkg&NR=1&feature=fvwp
http://www.youtube.com/watch?v=Y7b_nTaZYcU&feature=related

As you can see, this issue spans plasma TVs, as well as large and small LCD TVs and monitors.
The parts are cheap, and skill required is minimal.

Posted on Apr 08, 2011

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If you can see the screen iluminate I wouldn't assume the panel has failed. It seems that your video sources are not being decoded and then shown. I would suspect the mainboard (aka tuner board) to be having problems. It may not be getting the proper voltage needed from the power supply. When repairing, start simple and that is ALWAYS the power supply FIRST...then other components second.



Hope this helps, please rate.

Posted on Apr 08, 2011

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I have SONY BRAVIA MODEL KLV-32BX300 LCD TV the scren /panel was broken or Dameged .How Can I get the part of this product

Thank U
Tigstu

Posted on Apr 19, 2011

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Posted on Jan 02, 2017

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SOURCE: We have a Sony Bravia lcd tv model KLV-S40A10 - no power

Hi,the problem is from the fuse in the tv,it's blown and it's a means of in-built security against power fluctuations from damaging the unit,so the solution is to replace the fuse of the TV to restore your unit back to a normal working condition.

Be cool.

Posted on Jun 13, 2010

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