Viewsonic VA1912W's No Blue

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • toddstidham1
    Member
    • Sep 2007
    • 10

    #1

    Viewsonic VA1912W's No Blue

    Hey all, long time lurker, first time post. I've started fixing a batch of Viewsonic LCD Monitors. I found the power board with bulged blown caps (capxon greenies, 2x220uf, 1x2200uf and 1x1000uf) and I'm replacing them with same spec Panasonics.

    My problem is, the one is working now, but there is no blue color on the LCD. In the OSD Menu, all colors are set to 50% but adjusting them does nothing. This is the second one I recapped, the first I think also has a blown inverter chip for the ccfl bulbs, the screen stays black on that one (though the power LED no longer flashes on and off dim). When I used this second power board in the first monitor, I get the same screen with no blue color.

    Anyone see this before? Is the video board blown on both?
    Last edited by toddstidham1; 09-01-2012, 07:06 AM.
    -Todd
  • selldoor
    Slow Learner
    • Dec 2010
    • 7870

    #2
    Re: Viewsonic VA1912W's No Blue

    Should there be blue on the osd? and is it missing on there.
    Usually a missing colour is a faulty vga cable or socket - did you use the same cable on both?
    Please upload pictures using attachment function when ask for help on the repair
    http://www.badcaps.net/forum/showthread.php?t=39740

    Comment

    • ben7
      Capaholic
      • Jan 2011
      • 4059
      • USA

      #3
      Re: Viewsonic VA1912W's No Blue

      Try clearing the EEPROM on the mainboard, I had a Syncmaster who had a corrcupted EEPROM, which caused the picture to be black and red
      Muh-soggy-knee

      Comment

      • toddstidham1
        Member
        • Sep 2007
        • 10

        #4
        Re: Viewsonic VA1912W's No Blue

        Thanks for the replies guys.

        Yea, the OSD is in full color, but there is no blue color available. I get a windows desktop but it's just greens and reds. I did use the same laptop and video cable for both tests and you make a good point. I'll try the setup on a known working monitor tomorrow. Perhaps the problem is with the laptop and/or vga cable.

        ben7, I'm not sure I'd know how to do this. Is it shorting certain pins while powered on? using the OSD menu to reset defaults? Any elaboration would be helpful!

        Thanks, Todd
        -Todd

        Comment

        • Peter9DO
          Badcaps Veteran
          • Dec 2011
          • 277

          #5
          Re: Viewsonic VA1912W's No Blue

          Here is a link to the service manual for the model. Good luck my friend!

          https://cdn.badcaps-static.com/pdfs/...f5aba57d69.pdf

          Comment

          • toddstidham1
            Member
            • Sep 2007
            • 10

            #6
            Re: Viewsonic VA1912W's No Blue [solved]

            DOH! and LOL. The laptop's video port was the culprit! I used a different laptop and the monitor is working fine.

            I've since recapped my third monitor and it's also working great. Three more to go. Thanks guys!
            -Todd

            Comment

            • Peter9DO
              Badcaps Veteran
              • Dec 2011
              • 277

              #7
              Re: Viewsonic VA1912W's No Blue

              Nice!

              Comment

              • toddstidham1
                Member
                • Sep 2007
                • 10

                #8
                Re: Viewsonic VA1912W's No Blue

                So just to recap (pun intended!), I was able to fix five out of six monitors and all are working great. The sixth one did start up after the initial recapping, but then it made a snap noise and the backlights and video went out. I've checked the fuse (good) but there is simply no power output from the power board to the video board or to the backlight inverter. I suspect the transformer itself went but at this point I don't really care. Saving 5 out of 6 from the trash heap is pretty good. I'll hold onto the LCD screen itself (which still works fine) and just scrap the rest.

                Again, thanks to everyone that responded.
                -Todd

                Comment

                Related Topics

                Collapse

                • Document Archive
                  Microsoft Surface Redbank i5/8/256 Blue Notebook Specification for Upgrade or Repair
                  by Document Archive
                  This specification for the Microsoft Surface Redbank i5/8/256 Blue Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Surface Redbank i5/8/256 Blue boardview and Surface Redbank i5/8/256 Blue schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties...
                  09-07-2024, 05:50 AM
                • Document Archive
                  Lenovo IdeaPad IP3 14 I7-1255U 8GB 512GB BLUE Notebook 300 Specification for Upgrade or Repair
                  by Document Archive
                  This specification for the Lenovo IdeaPad IP3 14 I7-1255U 8GB 512GB BLUE Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the IP3 14 I7-1255U 8GB 512GB BLUE boardview and IP3 14 I7-1255U 8GB 512GB BLUE schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no...
                  09-07-2024, 05:00 AM
                • Document Archive
                  Lenovo IdeaPad IP3 15 I3-1215U 4GB 128GB BLUE Notebook 300 Specification for Upgrade or Repair
                  by Document Archive
                  This specification for the Lenovo IdeaPad IP3 15 I3-1215U 4GB 128GB BLUE Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the IP3 15 I3-1215U 4GB 128GB BLUE boardview and IP3 15 I3-1215U 4GB 128GB BLUE schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no...
                  09-07-2024, 05:00 AM
                • Document Archive
                  Lenovo IdeaPad IP3 15 I5-1235U 8GB 256GB BLUE Notebook 300 Specification for Upgrade or Repair
                  by Document Archive
                  This specification for the Lenovo IdeaPad IP3 15 I5-1235U 8GB 256GB BLUE Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the IP3 15 I5-1235U 8GB 256GB BLUE boardview and IP3 15 I5-1235U 8GB 256GB BLUE schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no...
                  09-07-2024, 05:00 AM
                • Document Archive
                  Lenovo IdeaPad IP3 15 R7 5825U 8GB 512GB BLUE Notebook 300 Specification for Upgrade or Repair
                  by Document Archive
                  This specification for the Lenovo IdeaPad IP3 15 R7 5825U 8GB 512GB BLUE Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the IP3 15 R7 5825U 8GB 512GB BLUE boardview and IP3 15 R7 5825U 8GB 512GB BLUE schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no...
                  09-07-2024, 05:00 AM
                • Loading...
                • No more items.
                Working...