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HP F2105 - Changes to have a green tinge

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    #1

    HP F2105 - Changes to have a green tinge

    Well this is a new one for me and searching this site and others hasn't yielded much help so I am hoping to reverse the trend with this thread.

    This LCD panel in this monitor is similar to others that I have so I started out by needing to change the CCFL at the top. In doing so, I introduced some dust under the panel that I need to clean out which is why I have the stickies to remind me for later so please ignore that for now.

    The monitor has both VGA and DVI inputs and I have experienced the same issue with different cables and different computers so I know that it is somewhere in the monitor.

    The issue here is that it turns on fine and looks perfect for some extended period of time...then something changes and the colour is off in some areas. Now it looks to me like there is a green tinge across most of the screen but some areas like fine. My thought is that some level of green is being applied everywhere but the areas that are fine already have some level of green that is higher.

    I have attached one picture with normal colour and one with the green for comparison.
    Attached Files
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    #2
    Re: HP F2105 - Changes to have a green tinge

    That's NO green tinge, that panel or controller on the mainboard lost number of bits, it's looking at a very lossy JPG like someone cranked down 24 bits to 4 bits of colors (256 colors or less).

    Tested with another monitor to isolate either monitor or PC itself?

    Cheers, Wizard

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      #3
      Re: HP F2105 - Changes to have a green tinge

      I'm not sure that I understand what you mean.

      The monitor resolution is the same but it's like the colour reproduction is off. If I open a white page like a blank Word document or this forum in a browser it kind of looks like the snowy background of a tv but it has a green slant.

      The red and green pixels seem to change constantly in a still image or white background as mentioned and give the 'snowy' appearance mentioned. I'm not sure if I can upload a movie but I could capture it that way if it helps explain further.

      Comment

        #4
        Re: HP F2105 - Changes to have a green tinge

        anyone?

        Comment

          #5
          Re: HP F2105 - Changes to have a green tinge

          Originally posted by freelander
          anyone?
          The most likely cause would be the video converter chip (or associated components) on the logic board.

          PlainBill
          For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

          Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

          Comment

            #6
            Re: HP F2105 - Changes to have a green tinge

            Originally posted by PlainBill
            The most likely cause would be the video converter chip (or associated components) on the logic board.

            PlainBill
            I agree. Post a pic of the boards to see what controller the video board have.
            There are 10 kind of people in this world: those that understand binary, and those who don't.
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              #7
              Re: HP F2105 - Changes to have a green tinge

              Get a jpg picture and a photo editor, turn down number of bits, and you will see what I mean.

              Cheers, Wizard

              Comment

                #8
                Re: HP F2105 - Changes to have a green tinge

                Originally posted by freelander
                Well this is a new one for me and searching this site and others hasn't yielded much help so I am hoping to reverse the trend with this thread.

                This LCD panel in this monitor is similar to others that I have so I started out by needing to change the CCFL at the top.
                I think you have to reseat the flat cable from your logic/main board going into your LCD panel. You might have disturbed that conenction when you were changing the CCFLs.

                Comment

                  #9
                  Re: HP F2105 - Changes to have a green tinge

                  Originally posted by lucky13
                  I think you have to reseat the flat cable from your logic/main board going into your LCD panel. You might have disturbed that conenction when you were changing the CCFLs.
                  Sounds logical. Now that I remember I had the same (similar) problem with a Samsung 940T. I removed the flat cable, cleaned the contacts, reinstalled, secured with insulation tape, and problem gone. You should give it a try.
                  There are 10 kind of people in this world: those that understand binary, and those who don't.
                  • ASUS ROG Maximus IX Code
                  • Intel Core i5-7600K 3.8GHz
                  • 16gb GSKILL TridentZ RGB DDR4-3200
                  • 1 M2 SSD + 2 WD Blue 1TB (Mirrored)
                  • Windows 10 Pro x64
                  • GeForce GT1050
                    2 x Acer KA240H + 1 Vewsonic VP2130 21 (a cap replacement job )

                  Comment

                    #10
                    Re: HP F2105 - Changes to have a green tinge

                    I did check the flat cable and re-seated it with the same results. This is one of those connectors that locks in...I will take a picture tonight.

                    Comment

                      #11
                      Re: HP F2105 - Changes to have a green tinge

                      Thanks for the advice. I really didn't think that the connections were loose but I took everything apart again and did notice that the connector was backing out slightly. I used a little warm hot glue (instead of the white stuff that was no longer there from the manufacturer), re-assembled and it's working so far. I will update if there is any change.

                      ...on to the next project.

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