TS3824 My 2006 iMac has vertical lines that wont disappear - can this be fixed?

My 2006 model iMac has vertical lines on the monitor that won't go away and are growing more all the time. Can this be fixed? I was told about the iMac Graphics Firmware Update but it doesn't work on my model - seems to be from 2011 models. Any suggestions?

Hello,
Have you blown the dust out lately?
Get Temperature Monitor to see if it's heat related...
http://www.macupdate.com/info.php/id/12381/temperature-monitor
Take a screen shot & view that in Preview, move the Preview window around, if you see double lines it's a Video card/VRAM problem, if the lines do not move moving the pic around then it's the LCD or cable.

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