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My Samsung LN-S4041D LCD TV starts-up, but the display remains black. The sound comes through just fine, but there is no picture. The unit initially displayed a line moving across the bottom of the screen for many month before the screen finally went totally black. I am hoping the problems is not the LCD screen itself. Possibly, a main board could be malfuntioning. Please give me some advice. Thank you.

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  • danrosefox Aug 22, 2010

    I tried your suggestion, but the screen is still blank. However, the audio remains functional. I do have
    experience repairing computer LCD monitors, but the board configuration is somewhat different. I
    noticed on removing the back panel that there are three distinct boards on the Samsung LN-S4041D.
    Is the vidio board the small board attached to the two ribbon connector cables toward the top of the
    unit? Are the two connectors attached to the LCD panel itself? And more important, is this where
    the problem circuit lies? I will be awaiting your reply because I believe you are on the right track.
    Thank you for your quick reply to my initial inquiry.



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If it is connected via HDMI ..try a different port ..I guess there are 3 of them ..and see if it works in any other one ..if not..and it is a plane video plug ..than the issue is from the image board..and probably it is just a stabilizer condenser..anyway it is from the image board and this can be changed all if case or just identify the part and replace ...My advice is to get to a professional repair shop or call someone that really knows what is doing cause there will be necessary to measure parts on the board one by one ..

Posted on Aug 21, 2010

  • Catalin Turcu
    Catalin Turcu Aug 22, 2010

    In deed there are 3 of them ..the video board will be the one that has direct connection to the lcd itself...the one that goes with the ports for cables is the main one ..and the other is audio ..and other setting s..
    if you have a little experience ..get a measure unit ..and see which one is failed....cause this can not harm it long you pay attention not to short circuit something ..
    Another thing to check is the redressing bridge on the power supply ..cause this also may cause malfunction on video ..but ..only if it has separate wiring to the sound..cause otherwise nor either the sound should worked..



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1 Answer

Why does the screen go black but yet still sound?

Moat likely it is because your power supply is defective and it is not producing tv sufficient voltage to power the backlight. I would replace the power supply.

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This tv has issues with 4 capacitors. These caps can be replaced for about $10. They are located at the top right corner of the power supply. They will read 10v,1000uF. I had the same problem, then I replaced them wit 16v,1000uF capacitors. And presto tv!

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Tv takes 5-10 min. to come on and when it does theres no sound. the picture also goes blank like it shuts itself off then comes back on

As far as i know the one fix for this is replacing the main board. if you need help finding the part let me know

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