Question about Samsung LN-S4692D 46 in. LCD HDTV

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Samsung LNR408DX/XAA Wont power up

I have a Samsung LCD LNR408DX/XAA that is approaching two years old in June. Recently when trying to power up the TV it would fail and not turn on. The TV would make a clicking sound as if it were about to turn on but would not turn on. On some occasions I could hit the power button several times, unplug the power cord and it would then turn on. Now however the TV will not power on and will continue to make a clicking sound about every minute or so. The red light that is on the power button on the TV will flash 4 times, I have heard that you are able to tell what is wrong with the TV by how many times this light flashes? Any suggestions, I am trying to avoid a costly repair? Thanks

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  • Anonymous Mar 18, 2008

    I have the same symptoms & it is only 8 months old. It just shut off while I was watching. I have the flashing power led 4 times & clicking sounds. I do have warranty coverage & they will be out soon. I will let you know what they find.

  • Anonymous Mar 28, 2008

    I have the same thing i died slowly first you could unplug and it would reset and now when i plug it back in the light flashes the 4 times and thegoes off. If i wait i alittle while the light comes back on and if i push it the sme thing happens. One other note when you unplug it it sounds like three relays click.

  • Anonymous Aug 15, 2008

    I have the same issue, and trying to find a way to get it fix through Fry's or Samsung. If anyone knows anything please post.

  • ambikagarg Aug 25, 2008

    hi ! i have the same problem. Same TV - please advice

  • shk1979 Feb 22, 2009

    TV wont power up. click,click,click and so on. I left it for 7 hours and it didn't turn on. TV is 2 years old this month. Definately the last samsung product i buy!

  • montana9 Apr 19, 2009

    From turning off the tv from the nite before, it would try to come on; but

    would make a clicking sound in an effort to come on...Once it did, I left it on. I came back later and, it had a funny smell to it. Once I turned it off it has not come back on..This is just another problem I have come to

    realize. My first one was the tv would just go black..But, it would come

    back on if I turn it off and back on. I will not buy another Samsung tv. I

    should have known. I am a Sony person..but, thought Samsung was an

    equel...That was my mistake...that I won't make again.. I have heard

    nothing but bad about there service, even if you have an extended warranty. I'm sorry if any of you have this same problem..Samsung will

    not stand behind there product. I have a model 4093...40' it has a great

    picture..but, if you can see it..its not worth the money.

  • Anonymous Apr 30, 2009

    I have the same problem and the warranty expired two months ago!
    I am an electronic tech and all can say it is obviously a bad design as many people have the same problem. Local service agent req. one week before they can look at it and $78.00 fee to say what is wrong.
    I was to fix and use as a spare and buy the brand new Samsung with Ethernet but I just decided to start using another brand.
    Many of my business & friends ask what to buy in electronics and I will advise against Samsung in the future both here in Oz and Europe



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I had the same problem with a 52" Samsung LCD. I found 2 electrolytic caps with bulging tops on the power supply board. (see pic). I looked to be the 5v section but I'm not sure. I got replacement at Fry's for $1.90 each. All is well!
Ahwatukee Al

Samsung LNR408DX/XAA Wont power up - ff0cf58.jpg

Posted on Jul 21, 2009

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    I followed the suggestion of checking the capacitors on the power board. They were shot so I tried taking the power board to get them replaced. It was really hard to get anyone to help me. Most of the repair shops stated they would not just fix the board and they would only repair it if the whole TV was brought in.     One of the smaller shops did help me out. He stated that this is not a Samsung problem, this is a LCD problem. My Samsung was only the second Samsung he has fixed in 4 months. He stated he has worked on many other brands daily with the same problem. This made me feel better after hearing all the problems and complaints on this thread.     The shop actually replaced all seven capacitors with 35v ones. He states blown capacitors won't be an issue in the future.  He explained that during some busy screen play, especially with HD gaming, these capacitors end up running 12-14v through them and that's what destroys the 10v capacitors. It's like putting a gallon and a half of water in a one gallon container and something has to give.     Sorry, I like to educate and explain things so am a little long winded. In Short: If you are experiencing clicking in your Samsung, Don't throw it out, Don't curse it, and call around to see who will not just replace the parts but potentially upgrade board to prevent future visits.

Posted on Aug 21, 2009

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I fixed this problem myself for £10 when samsung clicks and wont turn on its a fault with the power board. To fix this i removed the back pannel(16 screws) and inside is the power board with 6 screws holdining it in. In one of the top corners you can see 6 small ressisters 4 of which were blown on mine due to high tv usage and being left on stand by all the time. I took the board along to my local electronics shop and asked them to replace the blown one put it back together and has worked fine ever since.

Posted on Jan 17, 2009

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When I turn on my TV, I get sound, but no picture, any ideas as to what is happening here?

Posted on Jul 08, 2009

Same thing happened to me. The screws holding the hdmi input to the back of the tv weren't there - it came from the factory that way. Samsung didn't care. I found a replacement board on eBay.

Posted on Aug 14, 2008

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Anyone know where I can get a replacement board for the 408DX/XAA LCD TV ?. The HDMI port came loose and can not be soldered back on. Thanks in advance for your help!

Posted on Apr 29, 2008

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Power supply is bad

Posted on Mar 16, 2008

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