Question about Samsung LA40A550 40 in. HD-Ready LCD TV
There are a number reasons why this might happen:
Posted on Oct 02, 2009
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Posted on Jan 02, 2017
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,
Posted on Dec 16, 2008
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
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
Posted on Dec 15, 2009
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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