The iMac is Apple's line of all-in-one desktop computers.

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iMac 27" cleaning cache icons turned to fuzz

I need to restore some of my icons, they went fuzzy and look like tv snow, after I did a bit of a clean up on my imac. Ihave yosemite. Also thumbnails that I save to desk top are completely purple. I have a screen shot of the issue.

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Can you give us the last four digits of your serial number so we can correctly identify your system.

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If you have access to an external monitor which you can plug in see if the image is messed up on it. If external looks good the internal display LCD screen or its cable is damaged. If the external look the same then the graphics board is bad.

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