Question about Samsung LA40A550 40 in. HD-Ready LCD TV

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Picture goes off after a few minutes but sound remains. what is the problem?

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  • 210 Answers

Hi,

There are a number reasons why this might happen:

  • The backlight has gone (Find a dark place and shine a torch into the screen and see if you can see an image in the background, if you see an image then the backlight has gone) - Needs a new backlight (Engineer to remove and fit) or have a new panel fitted.
  • The panel has died - Need a new panel
  • A cable has worked itself loose or is broken
  • The inverter has gone - Need new inverter
  • The driver board is faulty
Thanks

Posted on Oct 02, 2009

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Posted on Jan 02, 2017

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Shuttle83
  • 1139 Answers

SOURCE: samsung plasma ppm42s3 , picture wobbling,sometimes screen goes blank

Hello arunaik_6,

This looks as if a component has become thermally sensitive. The best way to find this is to use component cooling spray. It looks as if the problem is localized to the tuner section. Take the back off of the TV and turn the TV on, wait until the problem occurs and lightly spray the tuner section with the component cooling spray watch for any reaction, then if this does not work spray the Microprocessor and the LVDS section and watch for a reaction. The set should go back to normal when it does that section is the problem, try to localize the problem to one component. Then replace that component.

I hope this helps,

Thank you,

Shuttle83
http://www.electron-age-technologies-llc.com

Posted on Dec 16, 2008

  • 53 Answers

SOURCE: Picture goes black but hear the sound

this is the problem related to display of ur TV screen...please contact the service centre...plz dont try to repair it urself..

Posted on Apr 30, 2009

maatmartin7
  • 1213 Answers

SOURCE: 47in Phillips-tv picture goes black still has

Could be the signal board has a bad cap, in this case it sounds like you are getting intermitten power to the inverters....when the tv goes down and of course you have audio....Shine a flashlight on to screen and see if you have a picture...look carefully. If this is the case..you have the above problem!

Posted on Nov 23, 2009

roety
  • 585 Answers

SOURCE: The picture on my TV goes black after few seconds

Hi my name is Roety,
I can help you with your issue ,
Sounds like a lamp going bad
No model listed makes it hard to guess here 
 
 
If I have helped you with your issue
If you have more questions you can still respond
I will reply asap
Thanks

Posted on Dec 15, 2009

  • 8457 Answers

SOURCE: polaroid tv screen goes black after 30 40 minutes,

Ur tv now power on only have picture few mins,than dead,have sound only?Yes,than the 1 or 2 the long board call the LCD inverter boards are dead.The LCD inverter long boards help the LCD screen to have a backlight to produced a picture.Tries websites like Shopjimmy.com,Ebay.com to buy 1 or 2 long LCD inverter boards for the replacement.

Posted on Jul 05, 2010

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