Sony BRAVIA KLV-S40A10 40 in. HD-Ready LCD Television Logo
Posted on Jan 14, 2013
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Black screen, but sound

Hi again. Black screen, but sound. Changed the GE2-card, still black screen. Got help here earlier, someone said it could be the power supply 24vDc. Where is that located? Whats the name of the curciut bord? When the power is on (green diod / light), the screen is dark. If I touch the screen, white "clouds" pops ut the places I touch. Any ideas? Please advice :) Eirik, Norway!

2 Answers

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  • Contributor 4 Answers
  • Posted on Jan 14, 2013
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Maybe it is the panel eeprom,if the panel inverter is good which should be treated with experts

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  • Master 2,351 Answers
  • Posted on May 17, 2015
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The failure with this LCD is a defective T-con board. If the T-con board is Samsung LJ94-00877E(400W2C4LV2.5), I would suggest to check F1 for open condition. Replacing the fuse fixes the no video, blank screen but sound or replace the entire board if available.

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5 Related Answers

Anonymous

  • 5 Answers
  • Posted on Jan 22, 2009

SOURCE: Black screen, no picture but have sound

the screen is on its way out

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Anonymous

  • 34 Answers
  • Posted on Jul 28, 2008

SOURCE: Sony Bravia KDL-S40A12U Blank screen

Hello

on your set there is inverter board that is what lights up th backlight on your TV making everything visible that board has went bad.

Thankyou

Anonymous

  • 10594 Answers
  • Posted on Mar 07, 2009

SOURCE: HELP! KDFE55A20 watching TV and screen goes black and loses sound

Yes, its most probably lamp issue.
Please but original Sony lamp from Sony store and replace it in TV.

Anonymous

  • 86 Answers
  • Posted on Mar 25, 2009

SOURCE: Sony Bravia KDL 46", no picture, standby light blinks 4 times

Since the TV is still receiving power, the problem is going to be with the TV's mainboard.  After you unplugged the TV and plugged it back in, you said the power light went out again, so I assume the standby light wasn't flashing again?  The flashing standby light is indicating an error code so my suggestion is to contact Sony for service options regardless if there is a warranty or not because service is the only solution to this situation.  Don't forget to provide them the error code or 4 flashes repeating.

Anonymous

  • 10594 Answers
  • Posted on May 17, 2009

SOURCE: Sony KDL-46V3000 Bravia LCD Black screen

Please count Sony KDL-46V3000 standby light blinks as there would be interval of 3 seconds between blinks. Let me know how many times light blinks as its an error code.

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The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
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Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
In some models of LCD TVS; the backlight inverter and its T'Con board will be a part of the panel itself, and will be a built-in type inside the LCD panel. If so, they can't be replaced. In this case; a panel replacement is the only repair. For some other models, the backlight inverter section circuit will be a part of the main power supply regulator [SMPS]. To such sets, the power supply section circuit too should trouble shoot. Contact any service technician. The circuit will differ with models and versions.
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Look into getting the main power supply replaced

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I repair digital camera
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