Question about Apple iMac G5 Desktop

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White vertical line going through my IMAC screen

I just noticed a white vertical line running the length of my IMAC screen. it is there even when i went on firefox. it was not there yesterday. it just appeared. this is my only ''working'' computer in my house and I rely on it. is this something that is going to get worse or can it stay localized to the one line and simply be a nuisance? The computer is about 3 years old. i do not know if it is a G4 or G5. my e-mail address is: mydurga1128@aol.com

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  • dabizz Feb 05, 2009

    I just had the same problem. One day all was good, then the next, there is a yellow line going down one row of pixels.

  • napilipt Mar 01, 2009

    I had an aqua line down my screen for last two weeks - now have a purple one and was so surprised how many people have had this problem. With over 20 years using apple products this is first time I've had a problem with anything mac. Very disappointed to hear of high cost to fix. Apple - do something!

  • Qtip5o6 Mar 20, 2009

    same thing except i have 4 yellow lines and one blue line, its gonna get worse

  • Anonymous May 04, 2009

    My boyfriend has an Imac he bought over a year ago. Shortly after the warranty was up the first vertical yellow line appeared and now, about 5 months later another vertical line appeared. He's not happy to hear it only gets worse and apple won't do anything about it.

  • geeimjo May 19, 2009

    What happens if person backs up their entire system, and reformats afterwards - in other words, is this a screen problem or a programming problem? Anybody know?



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The line is an indication that there is a failure in the display, most times the failure will be limited to the line you see but occasionally the problem will spread, causing more lines. the only way to fix it is to have the display replaced.

Posted on Dec 15, 2008

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That is a fine example of how crappy mac screens are. I am a Computer technichion and I know how cruddy mac screens are if your computer is still under warenty try sending it away to a apple store

Posted on Feb 05, 2009

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I'm having this problem too. About 3 weeks ago one line showed up and about every 5 days a new one shows up. I'm now at 4 lines. The Mac is 3 years old. I was hoping it would last longer than this! I wonder how long until I can't use it at all.

Posted on Oct 05, 2009

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So is there any way to fix it ur self?

Posted on Oct 21, 2012

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Same thing w/ lines. except I am having problems w/ my mouse. Well, I don't think its the mouse. when I have several windows up and trying to scroll on One particular window it will randomly go to another open window.

Now my Imac's hard drive just took a dive 5 mos. ago and I lost a lot of info. I had another hard drive put in by my ex husband, wonder if he pinched a cord???HELP!

Posted on Jan 07, 2011

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Hi Isobel,

Not much information there...

iMacs tend to start displaying vertical lines, lie white faded strips as they age.. unfortunately, it's like iMac Alzheimers.. nothing to be done under $600

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I wrote a while ago saying that i had lines running up and down my iMac I have not heard back yet and now have a fourth line.


Generally, vertical lines running down the screen are a sign that the LCD is beginning to fail. It will only get worse the more is fails. I would recommend taking to an Apple Store, if you are under warranty they will fix the problem. If you are out of warranty, the cost isn't too high, less than $400 to replace the LCD in the computer.

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When I bought this computer used, it worked fine for a couple months, then I began to notice multi-colored vertical lines on the screen. At first, there were only a couple lines. Then slowly but surely...


sound like you have two different problems the question mark is the computer can't find the hard drive. p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica} p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px}



Check for a failing hard drive


Trying booting from the Mac OS X install disc.

insert the Mac OS X install disc.

press the start button, while holding down the "C" key on the keyboard


Once you are running from the disc. go to Disk Utilities select the hard drive click the "repair permissions" button at the bottom.


If you get any red errors listed or it doesn't seem to finish repairing the permissions you have a failing hard drive and it will need to be replaced.


The vertical lines is one of two thing a failing LCD module of a failing video card.

Here is how to check which one it is.

connect an external display to it.

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If the lines don't show up on the external display the LCD module will need to be replaced.

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How long is a piece of string? is the kind of question you've asked. I've a sneaking suspicion you'll get sick and tired of it before it finally goes.

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