Screen Display Is Odd - Vertical Dotted Lines

When i start up my pc the display is odd like a chess board. Sometimes vertical dotted line's show up. This continues until i reach the login screen for windows. When i reach the login screen for windows all seems ok.initially my hard disk wasn't being detected. I removed the ide cables and than reconnected them did the same with ram also re-inserted my pci slot display card. Now my hard disk is being detected but the initial startup display is as i have described above.

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Horizontal And Vertical Lines On Screen

The other day out of nowhere my screen starts going nuts. It has a bunch of horizontal and vertical lines on the screen and they kind of move when the mouse is over them. When i open a new window, for example an aim window or notepad, parts of the program will display fine, without any lines, and other parts will continue the line pattern on the screen. When my computer starts up, it has weird gray images that almost look like japanese letters on the windows xp splash screen. I checked a different monitor and the picture is still weird, so it isn't monitor, so im guessing its video card. ? Anyone ever heard of a problem like this?

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