White line on imac screan

I have a whitee line come up across part of my screan happened once before got talked through it need it a second time please Chris

Is the white line solid in place or sort of flickering across the screen? Flickering lines in general is usually a sign the graphics card has failed. Sometimes after an EFI or SMC update vertical lines appear. What usually solved this was a PRAM and SMC reset.
Resetting NVRAM / PRAM
Shut down your iMac.
Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on your iMac.
Press and hold the Command(⌘)-Option-P-R keys before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.
Resetting the SMC for iMac
Shut down your iMac.
Unplug all cables including the computer's power cord.
Wait fifteen seconds.
Attach the computer's power cord.
Wait five seconds, then press the power button to turn on your iMac.
If resetting the PRAM and SMC didn't work and you DO see a picture on an external monitor then it's your LCD. If white line shows up also on the external monitor then it's your graphics card / logic board.

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My imac starts with a white screen, then goes black and a small white line just blinks in the top left corner of the screen?

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Try starting your iMac with the original DVD that came with the machine then launch disk utility to repair your hard drive.

White lines in Firefox on new 27 iMac with 10.6.2

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I am on the latest version of firefox and apple updates.

That would be the best bet. I do not see SL as being the cause.
Thanks

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I have a number of PDF files that were created from Microsoft Powerpoint presentations on a Windows PC. The Preview inspector says they were created with Acrobat Distiller 8.2.2. Until recently, these PDFs looked 100% correct when viewed in Preview or Safari. Now, though, they have horizontal white lines across the pages. There are 6 white lines on each page, evenly spaced, each about 1 pixel in height. They stay at 1 pixel in height even when I zoom in/out on the document. At some zoom levels (100% being one of them), the area above and below some lines will become misaligned. When viewed with Adobe Reader 9, the lines are not there but the misalignment is (though it is not exactly the same as in Preview). Unfortunately, I can't say when this started happening other than it was fine in September (2010) and isn't this afternoon (Nov 22, 2010). It happens on a coworker's Macbook Pro as well as my iMac so it is not something unique to my Mac.
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Hi, I am having this problem also on my iMac. Some of the images have the lines and some of them don't. When the PDFs are printed, the lines don't show. My problem is that these PDFs will be linked to on a website for the clients to print, and they will seem them with the lines. They are pretty unsightly, and my boss has put this into my lap to figure out, since I am the designer. Did you ever find an answer for this? I don't know where else to turn, since this company is insisting on using Pages, rather than something like InDesign.

White lines appear on videos since my new Mac Pro - Why?

Hello,
I'm the happy owner of a Mac Pro 2,7 GHz 12-Core Intel Xeon E5 / 64 gig RAM / 2X AMD FirePro D700 6144 Mo running on OS X 10.9.3 (13D65).
I'm using CC latest version but also Red Giant Magic Bullet LOOKS to color grade my videos (on an adjustment layer). I have 3 HDD (1 SSD in the computer with the programs + 1 external (Thunderbold) G-RAID for cache files + 1 external Pegasus R6 2 (Thunderbolt 2) for the footage).
Sometimes, when reading (but more often when exporting in Media Encoder) white lines appear on the video (see image below). Why?
Is that a Premiere problem? Is something going wrong with my Mac? I have already reinstalled everything from scratch but the problem remains...
I was working with the same programs on my previous iMac and I didn't have this problem.
Any idea ?

Nicolas.Olivier wrote:
Is it an Adobe or a Mac Pro 2013 related problem? Does everyone using the GPU acceleration have the same problem?
So far, it appears to be an issue with OS X 10.9.2 and up. Some folks that are beta testing 10.9.4 have reported that the strange artifacts no longer appear while using Hardware mode, but a few folks are still having Premiere crashes with it. My suspicion is that we're seeing two separate problems with Premiere on the new Mac Pro when using Hardware mode: 1) artifacts, lines, etc on exports and 2) application crashes. Neither of these appear to happen when Pr and AME are put into Software mode. Given the commonality of the problems (using GPUs on the new Mac Pro) some folks seem to think they're directly related. My gut tells me they aren't.
The challenge for the folks at Adobe and other third party app developers is that the boys (and girls) in Cupertino are changing things within OS X a bit too quickly, for better, for worse. Some of these changes are what I call "ninja patches" where they don't really explain what they're changing or why. I strongly suspect that's what's going on here. They sneaked something into OS X 10.9.2 and haven't un-sneaked it yet. Folks are strongly encouraging Adobe to address this issue pronto, but if Cupertino keeps altering the guts of the OS, how can they?

Flickering Grey / White lines across browser when video/animation is being played

Hi,
For a while now i've been getting these flickering grey/white lines across my browser, usually only noticeable when a flash animation, video or embedded advert is being played on the page. I only ever seemed to notice it happening when using Google Chrome, and a few tips suggested disabling one of the Adobe flash plugins on chrome. This seemed to fix the issue, until recently it came back again.
I decided to try and reinstall Chrome, which is when i noticed the issue happening in Safari too, which made me believe that it wasn't a browser problem but my Mac itself.
The lines seem to appear quite intermittently and only when a video or animation is being played.
Another thing i should mention is that i've not yet noticed this happening when watching video directly from my hard drive, it only ever seems to happen when i'm streaming online e.g. youtube, netflix etc But with the likes of netflix, it stops happening when i'm in full screen?
I'm currently using a Macbook Pro Mid 2010, OS X Mavericks 10.9.3. I also had the Logic Board replaced under a year ago due to other issues.
I also use dual monitors, My macbook pro and a Dell 27" IPS monitor. The flickering lines appear on both monitors, so it shouldn't be a display issue.
Below is a link to a video of the issue i'm having whilst i was visiting youtube:
http://youtu.be/En9zFT1HQ6I
Any suggestions to fix this would be appreciated,
Thanks,
Marie

I have also been having this problem. I recently bought a new iMac to relieve this aging computer, and kept this guy as a backup. I wiped the computer and installed Mavericks, and this problem keeps coming up. I have almost nothing on this computer... which is why I have no idea why it's having issues. The extended hardware test also shows nothing. Also tried resetting PRAM/SMC, which seems to make it go away for a little while.
Before I reset and upgraded to Mavericks, I was having another weird graphics issue where things would fragment and freeze either momentarily or permanently until I restarted. This mostly happened while I was using Skype. I brought it into the Apple Store several times but they apparently could never re-create the problem... I have a feeling these are related. I'm afraid the graphics card is failing and of course the warranty has run out.

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When I add a music file to a Keynote 3 presentation, white lines appear in the slide while in the play mode only. It also appears when making a DVD or Quicktime movie of the presentatiion.
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I wish I had a 10.3.9 machine to check, but, since your video card should definitely be up to the task, I think it's probably going to be that Keynote's having a unique problem with your setup. In Keynote, under the Keynote menu, choose "Provide User Feedback" and send your problem to Apple. It could be that it may not have been reported yet.

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Thanks

I have a similar problem. Not sure you're on here (since the post is really old) but did you manage to work it out? How?
My thread:
https://discussions.apple.com/message/19007548#19007548
My Imac froze earlier today as I was dragging an image from safari into indesig and when it froze the weirdest pattern overlaid the screen. It looked just like the opacity pattern from photoshop with grey and white squares. I turned the computer off using the power button and unplugged everything.
Now when I try to start it these weird lines appear on my start up screen (see link)...
http://meijerladdaruppgrejer.wordpress.com/2012/07/24/oops/
as you can see the apple and the wheel appears as normal...
... then it moves to a normal looking white screen (perhaps a bit greener than usual) and around 30 seconds later freezes at the blue screen.
I've tried the cmd + alt + p + r several times but it won't help.
If i press alt during start up I can see and choose my hard drive but just end up at the blue screen again.
Can I try starting it up in safe mode or something?

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I am using Acrobat 8 Professional on a iMac OSX 10.6.8. My files are pretty standard for print pubs. They usually contain type and images, and the images get the white lines where the text boxes are in the source file. It is maddening.

I forgot to say that I am creating source files in AI CC if that makes a difference, but I have had this problem in the past with previous versions of AI.

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If your iPod Touch, iPhone, or iPad is Broken
Apple does not fix iDevices. Instead, they exchange yours for a refurbished or new replacement depending upon the age of your device and refurbished inventories. On rare occasions when there are no longer refurbished units for your older model, they may replace it with the next newer model.
ATTN: Beginning July 2013 Apple Stores are now equipped to do screen repairs/replacements in-house on iPhone 5s. In some cases while you wait. According to Apple this is the beginning of equipping Apple Stores with the resources needed to do most repairs for iPhones, iPads, and iPod Touches that would not require major replacements. Later in the year the services may be extended as Apple Stores become equipped and staffed with the proper repair expertise. So, if you need a screen repaired or a broken screen replaced or have your stuck Home button fixed, call your local Apple Store to see if they are now doing these in-house.
You may take your device to an Apple retailer for help or you may call Customer Service and arrange to send your device to Apple:
Apple Store Customer Service at 1-800-676-2775 or visit online Help for more information.
To contact product and tech support: Contacting Apple for support and service - this includes international calling numbers.
iPod Service Support and Costs
iPhone Service Support and Costs
iPad Service Support and Costs
There are third-party firms that do repairs on iDevices, and there are places where you can order parts to DIY if you feel up to the task:
1. iResq or Google for others.
2. Buy and replace screen yourself: iFixit

Small thin white line

I've got an issue I just noticed in the top left corner of my screen. There's a thin white line that doesn't extend the entire screen right by the apple menu. Screenshot:
http://www.equals5.com/downloads/imac-screenshot.png
It stays there even when I switch Spaces. Is this a monitor issue? video card? Anyone? Thanks in advance!

the menu bar is transparent and will blur any picture under it. as such your desktop picture is showing thorough your menu bar. If you look at the desktop picture you can see there is a small white line that runs up the photo. That's what your seeing in the menu bar.
Try changing your desktop picture. Watch how each desktop picture shows through the menu bar.

Weird horizontal white lines going across the screen

I've had my nano 4g for around six months. When I first bought it, there was a single white line going across the top of the screen. It never really got in the way, so I didn't bother exchanging the ipod. Recently, another white line of pixels appeared lower on the screen. This line is there even while I reset it.
Besides replacing the screen or exchanging the iPod, is there anything that I can do to fix this?

It may (likely) be a video card issue. There is a "known issue" with certain iMacs made in a certain timeframe (2011-12 I think), and one of the telltale symptoms is vertical lines showing up on your display. Go to Apple's website (https://getsupport.apple.com/) to find out how to get support, then either call their service line (they usually pick right up) or take it into your nearest store's Genius Bar. They'll first check if your iMac's serial number is on the list of vulnerable machines, and then they'll have to do a diagnostic to prove that's the problem -- if your serial number's on the list and it fails the diagnostic, they'll replace the video card for free, even if you're not covered by AppleCare (and if you are, it's free regardless).
My iMac just had this problem, there were lines sometimes and just weird display issues other times. Eventually it just grayed out altogether and I couldn't use it. So it's likely your display problems will worsen if you don't get it looked at.
It took them about a week to ship the new video card over, install it, and return the iMac to me.
Good luck!

Fine white lines going across screen Horz.

I was working a iDVD project lastnight and left it working on it as I was sleeping. When I checked on it this morning my DVD had burnt fine. However I noticed that my display had 2 fine white lines going across the screen Horz. down about 2 inches from the top of the screen. I did a shutdown and then powered on again and the machine started up fine but the lines are still there.
Anyone have any suggestions on what I can try to trouble shoot this problem before I call Apple, the machine is still covered by AppleCare.

Vertical Lines on My iMac ;-( Doesn't look so pretty with them.
Apple has a service program for (now at least) earlier iMac G5's within a specific Serial # range. Here is a link to see if yours qualifies....
http://www.apple.com/uk/support/exchange_repair/imac.html
Otherwise, I suggest a call into Apple and make a formal complaint and get a case #. Yours isn't an isolated case, if this particular issue is reported enough times then Apple would be foolish not to extend the service program to cover all iMacs that are faulty or defective.
Asking customers to pay for expensive repairs to faulty parts just a little time out of the standard warranty is not good for their business. They need to step up and sort this out.
Customer Support #800-275-2273 in US. Get a case #.

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My iMac started showing a white vertical line on the desktop suddenly. I tried to change the users, safeboot. But, it didn't work out at all. Itried to drag it, but it didn't allow me to do so... Restarting, safebooting didn't work!
I have no clue at this stage.... I have gone through discussion forums, and realize there were couple of compliants resumbling the same.
Does any one know how to get rid of this problem?
Murthy
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Hello roshniculas,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I have read your post on how there is a white line going across your screen, and I would be happy to assist you in this matter!
In accordance with this document on Resolving Problems with Notebook Displays, I recommend contacting our technical support at 1-800-474-6836. If you live outside the US/Canada Region please click the link below to get the support number for your region.
http://www.hp.com/cgi-bin/hpsupport/index.pl
In addition, did you get call back from the escalation team?
I hope this helps!
Regards
MechPilot
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
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White Line 20" - Apple Care Experiences?

I'm interested the experiences of 20" iMac owners who've taken their "white line" monitors in for repairs.
Have the techs been receptive of the problem?
Do they treat it like dead pixels?
Is replacement based on the tech's opinion of how sever the problem is?
If you've had your monitor replaced because of the white line, how bad was it? If your desktop is set to black, was the "white" line 80% grey or 20% grey?
Did they replace your screen when they replace the power supply?
These are just a few questions to kick start the forum. I know once the white line appears, it's considered permanent on that LCD. I'm interested in taking mine in for replacement, but not if Apple is going to reject my request based on the severity, or brightness, of the problem.

Your description of the white stripe sounds just like mine. Soft feathered edge. Gets less pronounced as it heads toward the middle of the screen.
I'd heard somewhere along the line that the bad power supply was sending too much power to the LCD, resulting in this "damage". Once the power suppy was replaced, the cause is eliminated. The "damage" remains.
If you haven't had your power supply replaced, it will probably get worse. Given that you might only have 3 days left with the manufacturers warranty, I would probably take it to a certified repair center for a free diagnosis. You certainly bought it about around the right time for it to fall into the problemed category.

White line on imac screan

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