Color Bars all over my Studio Display Occuring steady

Just turned on the computer, and my screen is full of different colored vertical bars, and weird tings everywhere. Did several restarts, no changes? All has been fine until this???
I have not installed any new hardware or software lately.
Help needed please. Thanks for all suggestions.
I'm a G5 1.8 Dual OS10.4.6
It appears that the desktop is on screen, but very difficult to be usuable except the pull down menus are slightly visable. I did try a restart holding the shift key down...but the same mess came up only without the desktop behind the bars..think it was the log on page.

I too have an Apple 21" Studio Display. I love it as it is very accurate for print based graphic design.
I also get the weird color bars. Used to work fine on my G4, but on my G5 dual 2g I get the weirdness. Could be the VGA to DVI deal.
I remedy this by going to the display preferences and changing the resolution to another setting. That clears the mess and then I change it back.
Simple and quick! Other than that I have no perminant answer.

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Color Bars all over my Studio Display Occuring steady

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