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Benq RL2240H LED Blink and shut down after 1 sek

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    #1

    Benq RL2240H LED Blink and shut down after 1 sek

    hello

    I have Benq Led monitor,and problem is : when I turn on monitor shows logo and after 1 sek shut down.

    I changed all caps on power supply.

    when I unplug monitor for a day ,he turn on normally,and after 10 minuter shut down again.
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    #2
    Re: Benq RL2240H LED Blink and shut down after 1 sek

    today started normally,but when I plug vga cable to monitor shut down to stanby mode,orange led...

    Comment

      #3
      Re: Benq RL2240H LED Blink and shut down after 1 sek

      when I leave monitor for few hours , backlight turn on normally. for few seconds. after that only flashing when power on.

      Comment

        #4
        Re: Benq RL2240H LED Blink and shut down after 1 sek

        uploading pictures
        Attached Files

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          #5
          Re: Benq RL2240H LED Blink and shut down after 1 sek

          I see picture on display when I take flashlight near display,so backlight is refusing to start.

          any suggestions?

          Comment

            #6
            Re: Benq RL2240H LED Blink and shut down after 1 sek

            Hello,
            I have similar power board that is broken and i cant find schematic, so my question is can you tell me what voltages are you getting on that connector CN701(with 9 wires)?

            And about your problem it looks like your backlight is not working because of 2 possible problems:

            1)Maybe power board isnt giving power to backlight
            or
            2)Your backlight is broken and you need to check it

            Easiest is that you first check voltages on that small connector that is going from power board to lcd.

            Comment

              #7
              Re: Benq RL2240H LED Blink and shut down after 1 sek

              Originally posted by djordje View Post
              Hello,
              I have similar power board that is broken and i cant find schematic, so my question is can you tell me what voltages are you getting on that connector CN701(with 9 wires)?

              And about your problem it looks like your backlight is not working because of 2 possible problems:

              1)Maybe power board isnt giving power to backlight
              or
              2)Your backlight is broken and you need to check it

              Easiest is that you first check voltages on that small connector that is going from power board to lcd.

              voltage on CN701 connectors are 0.09V(first PIN and others)

              voltage on small connector that is going from power board to lcd is olso 0.09V and droping- rising

              Comment

                #8
                Re: Benq RL2240H LED Blink and shut down after 1 sek

                I changed this caps on board..
                Attached Files

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                  #9
                  Re: Benq RL2240H LED Blink and shut down after 1 sek

                  Hello there,
                  Did you solved the issues by changing the caps?

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