Question about Samsung LN-R408D 40 in. LCD HDTV

2 Answers

I have a Samsung LN-R408d Lcd T.V. It has sound and picture, but the picture is weak and distorted any movement on the screen has trails kind like it's in slower motion.

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  • Stan Lee Aug 23, 2010

    Where are these capacitors located? are they on the inverter board? Thank you for helping me

  • Stan Lee Sep 03, 2010

    I replace the power supply with a used one that I found on line last week and that wasn't the problem.I also found a used LCD controller/Tcon board and installed it today and that fixed my problem. The picture is great now.

  • Stan Lee Sep 03, 2010

    Both of the Guru's was way off the mark.

  • Stan Lee Sep 03, 2010

    It was the Tcon board

  • Stan Lee Sep 03, 2010

    It was the Tcon board..... Guru

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  • Samsung Master
  • 11,800 Answers

The image is dark because the back lighting is very limited  and the image has trails because the pixels can't be switched fast enough.  All this are clear indicators that this happens because the power coming from the source is low: open the back of the tv and test the power source with a voltmeter. Look for defective capacitors or shorted coils and replace them if you have even the smallest doubt.

Posted on Aug 23, 2010

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  • Samsung Master
  • 5,138 Answers

You either have Bad capacitors or the inverter board is bad which in that case companys do not have ant extras in stock Bad capacitors will be vented, or puffed up on top, 1000uf 16v
220uf 10v 330uf 10v

Posted on Aug 23, 2010

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  • ladywinn
    ladywinn Aug 23, 2010

    Problem could be your Display Panel and its the part they do not stock, Google to this Website

    Encompass Parts Distrbution and Type in your Model number for list of parts /Prices

    Also browse EBay under Electronics TV/Parts



    Bad Caps will be around the power supply board.

  • ladywinn
    ladywinn Aug 23, 2010

    If your model # is LNR408DX, Then Encompass Parts Has Free Service Manual you can Print out online Look on left upper side of Page Click on where it says LNR408DX.pdf. They also are showing 265 Parts for this Model.

  • Stan Lee Aug 23, 2010

    I went to Encompass Parts site and no service manual is availible. Am I to be looking on the main power supply or the secondary power supply board. I was able to locate a inverter board online for about $55.

  • ladywinn
    ladywinn Aug 24, 2010

    I went to Encompass Parts Distrbution and they are listing Free Service Manual for Model #LNR408DX and on the first Page up on left hand side it says service manual and under it is printed LNR408DX.pfd this is what you click with mouse to print out service manual,Heres another thing it could be your Display Panel that is going Bad causing slow picture movement,alot of time when this happens picture begins to stand still burriie looking but sound is on but does not match picture being produced.

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1 Answer

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