No picture, no sound, no blinking lights on Sony KDL-40W600B

Question

Sony Bravia 40" LCD TV

A series of 40 inch LCD HDTVs by Sony.

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R Foster @jazzbo

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crwdns2931729:0crwdne2931729:0: Kho 27, 2019

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No picture, no sound, no blinking lights on Sony KDL-40W600B

Cannot turn on with remote or button on TV. Unplugged power brick, waited overnight. Applied power again. Got a brief Sony logo on screen, then it went dark. I have repeated the power disconnect/reconnect several times. Results always the same. No picture (other than the Sony splash screen), no sound and no blinking lights of any kind. I notice that after the splash screen the display has a very dark purple-ish tint until I remove power. Is this a bad board? Any help with which one, if that is the problem? Thanks in advance!

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score 3 · Answer 1 · 2019-06-27T18:20:14-07:00

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oldturkey03 @oldturkey03

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crwdns2931729:0crwdne2931729:0: Kho 27, 2019

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@jazzbo "this “after the splash screen the display has a very dark purple-ish tint “ is most likely your backlight being on. This could very well be a mainboard issue. Post some pictures of your boards with your question so we can see what you see. Adding images to an existing question

Make sure you have a multimeter so we can check a few things

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oldturkey03, thanks for the fast response. I’ve added pictures of the 3 boards.

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score 2 · Answer 2 · 2019-06-28T23:14:12-07:00

jayeff @jayeff

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crwdns2931729:0crwdne2931729:0: Kho 28, 2019

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Hi @jazzbo ,

Since you get the splash screen and the unit stays powered on, I'm wondering if it is a software problem rather than a hardware problem. Which would also be on the mainboard where the problem may be as suggested by @oldturkey03

Here's a link showing how to update the firmware in your model TV.

I don't know if it will work if your TV's firmware is a later version or not.

You can contemplate attempting this as a last resort if all else fails to resolve the problem

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Thanks @jayeff. If all else fails I'll give this a go.

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