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Blinking column on screen?

February 18, 2011 at 20:50:25
Specs: Macintosh
Hello, their is a blinking column on the right side of my screen that shows up randomly. It generally shows up when I am playing World of warcraft, and usually stays on my screen for a number of hours. Restarting and shutting down my computer does not get rid of it, and it takes up about an eighth of my screen. My computer still functions fine, its just really annoying. Currently I have a MacBook with an OS operate system.

Thanks to whoever can answer my question!

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February 24, 2011 at 06:00:49
What version of Mac OS are you running?

Click the apple button on the top left of your screen, then click about this mac.

How old is the computer?

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