IMac 27inch screen flickering

The left bottom side of my 6 month iMac 27inch gets flickering and darker, and if I press on the screen, it gets the correct lightning. What should I do? Is there any way to repair this by software? Or do I have to call apple care? thanks

Flickering would be covered by the warranty. I would recommend buying AppleCare though, you can find it discounted by doing a little searching. For example on Amazon I see it for about $130.00

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New iMac 27inch screen flickering/tearing/shutoff (continued)

This thread is a continuation of [New iMac 27inch screen flickering/tearing/shutoff|http://discussions.apple.com/thread.jspa?threadID=22 12682]. The thread was becoming too long and was causing some browsers to time out. The older thread has been locked.

citrus101 wrote:
Hi Brett L,
thank you for the coordination of this helpful thread. Are you Apple? If yes, please allow me to ask you three questions:
1) The Display Firmware stopped for over 90% the flicker issue, but what has this Firmware changed exactly?
2) Is Apple preparing a fix for the yellow tinge?
3) When will it be save to buy a new iMac?
Thank you for your efforts.
Hello Citrus.
Excellent questions.
I hope that Apple will authorize Brett L. to provide us with some clear, honest answers to them . . . although, as I pointed out before, it would seem by the latest messages that have been posted in this thread -- that is, the *original thread* -- that through their actions, Apple has already provided us with their answer -- and solution -- to the yellow tinge issue; and that is the replacement of the LCD panel.
As to what the most recent display firmware update did, I am doubtful that Apple will allow Brett to reveal that kind of information, but we can be hopeful.
As far as when it will be safe to purchase a new iMac, I seriously doubt that Apple will say anything which would suggest that it is not safe to purchase a new iMac now. What company is going to say "Don't buy our product now. It's not safe"?
For my part, I have now contacted Apple regarding the issues that I am having with my 27" iMac, and I will wait over the next few days to see how things play out. Based on the testimonies of others here, I don't expect Apple to disappoint. I have the confidence that they want to leave me a satisfied customer who will continue to purchase their products in the future.
Message was edited by: Warren Beasley

New iMac 27inch screen flickering/tearing/shutoff

I have been experiencing some problems with the all new iMac 27inch display.
At non-fixed intervals i will get one of the following:
Screen distortion/flicker somewhere random in the screen (feels like it is more in the lower part) that looks like a horizontal bar of about 2-3inches just popping in and out of the screen.
Screen will go completely black for a second and then come back on. Sometimes 2-3 times in a row.
Somebody else already made some video-clips about these problems, I am experiencing exactly the same behaviour.
http://www.youtube.com/watch?v=SjOxlxVz5Os
http://gallery.me.com/larzy#100025
Just to not that in the course of writing this post my screen has flickered 13 times and has gone black 2 times.

I received my 27" iMac three days ago and ever since i got it out of the box and turned it on it has done the same as the video shows.
Last night i watched a 30 min programme on BBC iPlayer and the 2-3 inch white lines kept popping up every few seconds horizontally across the screen. The screen also went black momenterally on 6 occasions.
I cannot believe after three days that this problem is so bad. I spome with Apple this morning on the Apple Care line and they told me to:
1. Shut down and take out power cord for 20 secs then turn back on.
2. Shut Down and then hold down "D" when turning back on which performed a hardware test...
Both had no effect.
Luckilly i am still within the 14 days of recieving my iMac and they are sending out a replacement but i am worried that this machine will have the same problems...
Is anyone happy with theres and is anyone not experiencing this problem... There seems to be a big issue here???

My iMac 27inch screen keeps going black but everything is still running in the background? please help

My iMac 27inch screen keeps going black but everything is still running in the background? please help. I have read that apple are recalling 27inch iMacs....

Hello @DesCherryBomb,
I understand that you are having issues with your HP 2310m monitor going blank and/or flickering. I am providing you with some steps you can try below:
Step 1. Unplug the power cord from the back of the monitor and the wall
Step 2. Hold the power button down for at least one minute
Step 3. Plug the power cord back into the monitor and then into the wall outlet (not a power bar or surge protector)
Step 4. Press the Menu button on the monitor
Step 5. Navigate to the Factory Reset option and select it
If the above steps did not resolve your issue you can try the monitor on a computer or other device to see if the issue persists. Please call our technical support at 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://www8.hp.com/us/en/contact-hp/ww-phone-assist.html
Thank you for posting on the HP Forums. Have a great day!
Please click the "Thumbs Up" on the bottom right of this post to say thank you if you appreciate the support I provide!
Also be sure to mark my post as “Accept as Solution" if you feel my post solved your issue, it will help others who face the same challenge find the same solution.
Dunidar
I work on behalf of HP
Find out a bit more about me by checking out my profile!
"Customers don’t expect you to be perfect. They do expect you to fix things when they go wrong." ~ Donald Porter

IMac 27inch screen shutoff

hi my iMac 27inch screen shutoff automatically. Sometimes I can wake the screen up again but sometimes I can't. Sometimes the screen just turns back on after a few minutes. I sent it back to the place I bought it. They say the either the motherboard or the screen is broken. I have to pay something around 800 dollars to repair it. It almost half price of the computer. Is there any other solution to my problem?

Only if they are wrong about the screen or motherboard being broken.
How old is it? And you did not get apple care when you bought it?
Had you gone to system preferences>energy saver and adjust the time before the screen sleeps?
The "turns back on" kind of is a bad sign for you though... Sorry I am unable to help at ALL.

24" iMac Silver - screen flickers

Just pulled it out of the box today. I can't operate at anything less than full brightness or the screen flickers. I can't find any other posts on this one. I see a lot of other related issues. Anyone having this issue? Did it go away?
I can't lose this machine to apple for repairs.

same for me, When I try and use the main system brightness control at the lower levels the display tends to have uneven strips that are lighter and darker.
its like if the monitor turns on and off very rapidly, like high speed blinks, i use an app called SHADE, it dims the monitor (dont now how) the screen dont flicker anymore and its free
http://www.charcoaldesign.co.uk/shades
Unlike other solutions, Shades doesn't change your display settings, and won't screw up your monitor's colour profile.
BY THE WAY, MAYBE ITS A PROBLEM RELATED TO THE FREEZING IMACS DUE TO THE ATI GPU
fine app, right price

Imac 2009 screen flickers in lion

It's back! Since upgrading to Lion, the infamous 27" 2009 iMac screen flicker has cropped back up. Its not so often, and usually not too long after it wakes up. Anyone else seeing this? What to do?

Actually, I've just noticed that it also flickers if I tap the right spot during the BIOS bootup (gray screen when laptop first turns on). Disabling the SMS in MacOS didn't make a difference, so I'm going to assume it's hardware and get that logic board that's troubling everyone else replaced...
Thanks for your help...

How do I revert to oem Apple screen color profile of iMac 27inch screen ?

In a series of desperate attempts for color matching my print outputs of " a Pro RGB printer " to my iMac, I made a mess of my iMac screen color profiles.
How can I revert to the OEM screen color profile that my iMac was running on the day it arrived.
iMac 2012 - 12,2
intelCore i7
3.4 GHz
AMD Radeon HD 6970M

System Preferences->Displays->Color->select the one labeled iMac.

IMac freezes, screen flickers, simply power fails or restarts when visiting Javascript "heavy" pages in safari

For the last couple of updates in Mavericks I'm having an issue on my 24" iMac (early-2009).
Whenever Safari wants, it makes the screen show some graphical glitches and everything but the mouse are inoperable and that only to the extend of moving the cursor, because clicking doesn't do anything. Some other times the machine just crashes, on some few occasions it has even told me there was an error and has send an error report at apple.
I tried disabling all 4 of my safari plug-ins and reseting everything in Safari, but nothing changed.
Then I started playing around with detecting what might be causing this, so I have come to the conclusion of it being a JavaScript (or JQuery?) issue.
Since I'm a programmer and a web-designer, I tested it on a few webpages created by me and I soon noticed that if I try to stretch out the usage of let's say a slider by clicking fast on the "next slide" it caused the issue.
After that I checked and saw that indeed the more JavaScript calls a page has the more the chances of Safari "crashing" (I'm using quotes, because not once has simply safari crashed, that would be an improvement in my case!).
All other major Browsers (Chrome, Firefox and Opera) don't seem to cause this issue, neither has this happened on any other occasion but when I'm working on Safari.
Any ideas on what might be causing this and/or how to fix this?

Check these links for suggestions:
http://guides.macrumors.com/Testing_RA
Using Apple Hardware Test
BTW, do you have any third party RAM installed? If yes, try removing and check for issue.

My iMac 27inch 5k screen has a huge line of dead pixels. I bought it today itself!!!

I Just bought my iMac 27inch 5k and after Unboxing it, came to realize that the screen has flickering and dead pixels all over the left side.
is this a hardware or sodrware issue and can I repalce it with a new one since my warrantee is a day old?!

If you bought it directly from Apple, you have a 14 day return or exchange window. Take advantage of it.

IMac 21" late 09: Slow, screen flickering/tearing and odd behavior - the problem that puzzles everyone

PLEASE HELP!
My iMac 21" late -09, started acting a bit wierd a year ago. Things got worse rapidly, it got slower, the screen flickers/tears (see link below), short moments of lost internet connection, lost connection whit the keyboard (might be keyboard that is broken), almost overheats when gaming and odd behavior on some webbsites whit galleries and/or videos.
Let's begin whit the screen: it's not vertikal lines or major distortions, just a subtle horisontal line that "wanders" from bottom to topp and some lagging from time to time. Looks like this: http://cl.ly/3i2W2o3S1D2T
The wierd thing is that hi-res does not mean more "tearing". Yes the lagg and risk of tearing increases, but the connection seems to be: lots of movement=tearing. So a pixeld 240p video of people dancing can be way worse than a news debbate in1080p!?!
Lost connection whit internet and keyboard rarely happens and is probably due to something else, but thought that was good to have in mind.
Odd behavior: galleries ex: when browsing images on Facebook in fullscreen, the image sometimes jumps around in the beginning and when clicking on next the same picture might appear again or just nothing at all. When scrolling down overwiewing a gallery, the updating stops and you can't scroll down further. This problem appers mainly on FB, deviantart also acts a bit wierd but there is often small issues whit image sites. Doesn't help to switch browsers either!
Videos: Youtube is horrible to use, stops loading, dosen't start loading, erases everything loaded (grey bar disapears and reloads), refuse to switch ressolution and suddenly stops the video like it was done! "ehh.. wasn't this 2min long? Not anymore, now its 34sec!". Mainly a Youtube problem but many similar sites can be a bit problematic to use.
NO, it's not the HTML-5 problem or any standard flash issue and using a different browser dosen't help!
Worst is the fact that most of these errors are not constant! One day your watching youtube or mabey a movie in VLC, a bit laggy, but almost no problem. Next day **** brakes lose and after 2hours of struggling you are ready to stabb yourself in the face!
What i tried: Most easy buggfixes that might cause the above problems, updating most things, Switched from OS X SL to OS X ML, complete reinstall and some things i probably forgot by now. Then went to MacStore for repair, they didn't find anything wrong and said it worked fine after the standard diagnostic/repair program!?! Went home and everything was the same! Went a second time to MacStore, same result.
So I'v reinstalled a few times and it seems to improve the Mac. But 2-3weeks later every error is back, even if I barely installed or downloaded anything!?!
Any idea what this could be? Or is the graphic card broken and MacStore has a blind, inbred muppet as a technician?

No I didn't. The first time i explained the problem thoroughly and thought that they just couldn't miss such a visual error. I was wrong. The second time the technician wasn't there so i showed the above clip to the salesstaff and explained everything onceagain. Later the technician called me and we talked for 10min.
Btw, the problems always "manifests themselves", just varies between strenght and frequence.
But all other issues aside, what could cause the tearing of the screen as seen int the above clip?

IMac 10,1 screen flickers

The screen flickers after I have been on the computer for 10-15 minutes. Back in January, the hard drive failed and was replaced. Is flickering a sign that the video display is about to die, or something less of a pain in the rear?

Unfortunately I cannot help, but I have the same issue. What I observe is that it tends to get better the longer the machine runs, i.e. heat becomes it. From Leopard to Lion the iMac would not go to sleep ever, only display sleep (black screen), but the rest would be running. During that time I hardly ever had any screen flickering issues. Only when I booted up after a prolonged period of rest (the machine, not me). Under Mountain Lion it seems it's gotten past its insomnia. So I have frequent screen flickering, but after some 30 minutes of activity it tends to bget better. But I seem to observe a slow digression. That's all I can say. My Harddisk was replaced years ago by an Apple Store. I am wondering whether it's financially wise to bother with an old machine like that. But I hate to throw things away...

I just buy a imac 27inch when after intalling everthing for windows 7 and all the drivers i need and goes to the restard part my imac just goes to a black screen with a blinking cursel and it just wont proceed anyone can help me with this?

i just buy a imac 27inch when after intalling everthing for windows 7 and all the drivers i need and goes to the restard part my imac just goes to a black screen with a blinking cursel and it just wont proceed anyone can help me with this?

Support articles for things like this would be here:
http://www.apple.com/support/bootcamp

2012 iMac Screen flickering

I just bought a brand new, but previous generation 27" iMac a couple of weeks ago, and today I have begun experiencing some noticeable screen flickering. It doesn't go black, and there is no yellowing. I have read reports of past iMac flickering problems from 2010, etc, but haven't found much info on those bought in 2012.
Aside from hauling the computer in for service, has there ever been a fix for this? I have done all software updates that are available. Worst case, I'll take it in, but I'm checking here first.
Thanks for any help.
2.7 GHz Intel Core i5
4GB RAM
AMD Radeon HD 6770M 512 MB

I had screen-flicker and color-distortion issues on my mid-2011 27" iMac about two weeks back. The issue ended up being a bad video card (AMD Radeon HD 6790M 1 GB).
If you are still in your buyer's remorse period, you can exchange your machine for another one. If not, you can always have it serviced for free under warranty

Imac 27inch custom built flicker screen solution??

Dear friends and apple support team,
i have imac 27 inch custom built and it have the same issue with screen flickering and the local supplier change the machine with a new one and after using the new machine fir one day only the same issue has been happened.
so please let me know how i can fix this issue?
thanks

Only if they are wrong about the screen or motherboard being broken.
How old is it? And you did not get apple care when you bought it?
Had you gone to system preferences>energy saver and adjust the time before the screen sleeps?
The "turns back on" kind of is a bad sign for you though... Sorry I am unable to help at ALL.

IMac 27inch screen flickering

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