A series of 40 inch LCD HDTVs by Sony.

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Screen went suddenly blank. Sound, but no picture.

No picture. Happened suddenly. Tried the troubleshooting in book. Removed power overnight, same results. Called Sony, they had me reset to factory settings. Now no picture, no sound, nothing. Tv is only 3 years old! KDL-40W600B. Told me to contact repair facility 2.5 hours away!

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@algog43 just to clarify no video and no audio? Does it show any sign of life? Any LED blinking?

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Had sound, and was able to switch channels before I did the factory reset. Now there is just the green light, no blinking. I will get into it later this week.

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Looks like there is a signal to screen. Either the board or the screen. Board $198, Screen about $300. Not worth it. No blinking LED.

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This is a bad product.I have the same problem.

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@algog43 proceed by following the triage chart for your model

Block Image

and let us know what you find. We still need more info to see if any LED is blinking. you can also post some images of your boards with your question. Use this guide Adding images to an existing question for that. Since you have audio but no video I would concentrate on the LVDS cables and the T-Con board. Most T-con boards are fused, so check the fuse for continuity.

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hallo oldturkey. i have same problem n same tv model.

my tv backlight seems to be fine. it has sound but no picture came out.

what should i check first?

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A word of caution: The factory reset most likely changed the input setting so double check that you actually have lost sound. I would suspect a power supply problem initially as these are the most common. Also, are you sure that the back light is working? Use the flashlight method to see if there is an image on the screen. Again, I would suspect that the back light is not working. Once this is verified, we can then examine further and provide additional items to check.

Dan

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I have 49” Sony 4k, costed me Rs.1.5 lacs .. and few months later , screen goes blank, no picture no sound.. and it is happening rather frequently then I have to switch off the main switch and turn it on and pray that pictures come

Emmm… suggest not to use Sony for more than two hours.. at a stretch in a day - because as they say it’s “HOT”

I guess it does goes HOT

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Alex zal eeuwig dankbaar zijn.
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