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Samsung LCD LE40R86BD flickering after 5 minutes

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    Samsung LCD LE40R86BD flickering after 5 minutes

    Hello,
    I have a Sumsung LCD (Model: LE40R86BD) and after 5 minutes approximately
    starts to flickering about one two times and after some time stars the same thing again. There was one capacitor that was blown and I replace it. I measured all the voltages at CN801 and are OK. When the display turns off the "POWER ON/OFF" signal goes low (0Volt) and after 3 seconds come back high again. Maybe after some time something get hot and do that flickering? Any ideas for what to looking for?

    Power Supply BN44-00167A Schematic:
    Attached Files

    #2
    Re: Samsung LCD LE40R86BD flickering after 5 minutes

    try this, unplug tv from outlet, unhook cable from powerboard to mainboard, leave it off, plug power cord into powerboard, plug into outlet, see if backlight stays on steady instead of going out or flickering after 5 minutes.

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      #3
      Re: Samsung LCD LE40R86BD flickering after 5 minutes

      If the backlights flicker, turn them down to 60% and see if the stay on.

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