Question about ViewSonic VA520 15" Flat Panel LCD Monitor

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Help.. LCD colors

I don't see any green , red or grey color when I log into any website.. My screen missing background colors. Would you please help me out?

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Steve Nordquist

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Reconnect your cables!  Somehow you don't have red and green in there, just shades of blue, right?  And it doesn't depend on whether you're running a browser or something else?

Make sure everything's tight and if you can (but only if tightening cables didn't work,) check that your computer's putting out a normal signal by testing another monitor with that computer.

Posted on Aug 18, 2008

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Check the cable going into the back of your monitor and the cable from your monitor into your computer, one of them is most likely loose.

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Enable Log-On Screen


Windows, by default, is set to show the Welcome screen during startup.

To enable the log-on screen to show, go to "Start" menu and select "Control Panel".

In the control panel, click on "User Accounts".


In the "User Accounts" dialog-box, click "Change the way users log on or off" and uncheck the "Welcome Screen" option.

Click "Apply Options" to save the changes.

Change Log-On Screen Background Color


To change the log-on screen background color, go to the "Start" menu and click on "Run".

In the run dialog-box, type "mspaint" as the name of the program to "Open".


Click on "OK". In the "Paint" window that opens, select "Colors" from the main menu and click on "Edit Colors". In the "Edit Colors" dialog-box, select "Define custom colors".


Here pick the color of your choice and note down the "Red", "Green" and "Blue" values.

Write down these values somewhere.


Click "Cancel" and close the paint window without saving. Now, go to the "Start" menu, click "Run" and enter "regedit" as the name of the program to "Open".


In the registry editor, navigate to HKEY_USERS\.DEFAULT\CONTROL PANEL\COLORS and double-click the "Background" string.


In the "Edit String" dialog-box that opens up, change the values in the "Value data" field to the red, green and blue color values that you wrote down (e.g. 75 78 173).


The default value will be 0 78 152. Enter the values in the correct red-green-blue order, separated by a space. Close the registry editor and log off to see the changes.


Put Image in Log-On Screen Background
To put your favorite picture in the background of the log-on screen, click "Start", then "Run", and type in "regedit". In the registry editor, navigate to HKEY_USERS\.DEFAULT\CONTROL PANEL\DESKTOP and double-click the string "Wallpaper". In the "Edit String" dialog-box that opens up, enter the full path and filename of the image that you want to use as the background. The image must be in .bmp format. Click "OK" and close the registry editor. Log off to see the changes. hope this helps




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1 Answer

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I believe that you must reset the colors of the screen by the buttons on it or try to set colors by the software that the product came with it if any. There should be a setting to configure the 4 basic colours like red green black etc. Try to adjust green. If nothing helpes go the monitor back to test it by the store you bought it if there is warranty. Hope that helped!

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1 Answer

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THe most likely cause for this problem is bad connection of the cable connecting the main TV board with the LCD controller. It's called LVDS cable and is hard to miss, usually fat round and black, connecting a board from the chasis with a little board in the top center of the LCD assembly.

I'd open the TV and gently try and reattach the cable to see if that yields any results. You can try it a few times, in fact I'd do it while the TV is open and working so I can better see if adjusting it makes a difference.

There's also a chance that the LCD logic itself got burned and misses on one of the colors. But I don't remember ever seeing that.

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if you have H/D one of your cables might be loose red/green/blue  i suspact red

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