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Tim Nolan
Tim Nolan, TV Repair Technician
Category: TV
Satisfied Customers: 19454
Experience:  Factory trained TV repair technician. U.S. NAVY trained.
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My Samsung flat screen HD TV keeps turning itself off and on

Resolved Question:

My Samsung flat screen HD TV keeps turning itself off and on and complains about cable connection. Does not stay on channel when connecting with the direct TV box. It also shows grey lines throughout the screen and then turns itself off and then on again!
Submitted: 4 years ago.
Category: TV
Expert:  Tim Nolan replied 4 years ago.
Thank you for posting your question on Just Answer! I will be happy to help you with this problem. Can you please give us some more information so I can better answer your questions.

-When it comes on with a picture or a no signal message, how long does it stay on for?
-How old is the unit?
- Do you have this problem while watching all different devices hooked to this television? (DVD player, cable, satellite, game counsel, etc.)

Please give me this information and I will be happy to assist you further.

Thank you,
Tim Nolan
Customer: replied 4 years ago.
It stays just on for few seconds and then it turns itself off and on again, it restarts itself continuously!

When this started last night, the picture on the movie just froze and a sound came on.... like a digital glitch but then it would get back to normal for a little bit! Then it just seemed to loose it and the grey lines came on. I thought as it complained about the cable that it was maybe the cousel but it kept doing with everything else unplugged from the TV and turned off.

We got it maybe 2 years ago or less!
Expert:  Tim Nolan replied 4 years ago.
There are a couple of things that could cause this, unfortunately there is no reset for this television other than unplugging it. It will have an internal failure at this point. I will try to explain the possibilities the best I can.

First you could have a failure in the power supply, we have seen some capacitors fail in your model and cause funky problems like this. If this is the case you could be looking at somewhere around $175-$200 to fix the set. IF the power supply had to be replaced you could be looking at $250-300

Next could be the main board, this would not be good news because you could be looking at $300-$400 for the repair (I know this is up there in the price range and most likely getting over the cost of a new set)

Lastly you could have a problem with the panel itself, this would mean a new set for sure because the part cost is more than a new set. The panel in your tv is about $800 just for the part.

Any of these could cause your problem, but it will require troubleshooting to determine the exact cause of your problem. If you have experience, and test equipment and would like to attempt some troubleshooting I will be happy to assist you, however if you do not have equipment or experience then you would need a repairman at this time to get an exact diagnosis. I am sorry that I don't have a quick fix or easy answer for you on this one, it is definitely an internal failure.


If you would like any additional information or have more questions please don't hesitate to ask!

Please remember to press the ACCEPT button when we are finished, it is the only way I can get credit for helping you. I want you to be 100% satisfied so please, by all means ask any questions you might have on this subject. Positive feedback is always appreciated.

Thank you,
Tim Nolan
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