My screen is showing vertical lines at startup
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Connect to an external monitor to determine if you are having problems with the graphic chip set.
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I did that and the external image is fine. Any thoughts? Also, tried
another known good screen......
It sounds like your LCD is damaged, assuming that the lines don't disappear after startup. Here's a guide to replace an LCD
iBook G4 12" 1.33 GHz Display Replacement
The LCD may or may not be the problem. The video data cable could be bad or the cable ends not seated properly. Don't you think they ought to look there first since the LCD can only display the information given to it. If the cable is bad the LCD won't display a proper picture.
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