IMac display pixel brightness fail

Hey, i have a iMac 27inch mid-2010 running 10.8.2. and my problem is that my screen has different light levels around the screen (the left side is darker than the right)
I have a few pictures off my screen here
http://imgur.com/a/2hJJj
I tried to reset my P-ram by shutting down the computer and starting it up again with CMD+ALT+P+R, but i didn't work.
Any help is much appreciated

Take it in for service, the left side backlight is out.
Apple - Support - iMac - Service FAQ

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24" IMAC Display Too Bright

I am still doing DD on changing from WinTel to Apple. I have viewed both the 20 inch and 24 inch models at a local reseller. I have heard of several complaints that the 24" is too bright. Is there any validity to this complaint? Can the Brightness be easily adjusted? And a third question are there advantages to using a local reseller rather than a purchase directly from Apple re the net?

Hello,
The iMac 24" isn't an iMac (Flat Panel) in Apple's eyes so those of us in this forum won't be nearly so familar with specific issues like the brightness of the display on the 24" iMac. You should re-post your question here.
Of course the local retailer you can speak to face-to-face about your requirements and return it for support in the very unlikely event you have any issues. The online store may well be a very little cheaper and will probably have better build-to-order option.
G4 (Flat Panel): Intel:
regards
mrtotes

IMac display jumps 1 pixel left and right

Has anyone ever heard of this before, it seems crazy to me.
My iMac display started acting up two days ago.
When the cursor crosses the screen from side to side, the screen jumps 1 pixel to one side!
Specifically, moving the cursor from left to right, the screen jumps 1 pixel left (as if it is panning over to that side) and and the reverse for the reverse direction.
The 'extra' column of pixels appears normal (ie not simply black).
The picture is a little fuzzy.
At lower resolutions, the screen looks terribly fuzzy like the anti-aliasing has become overactive (maybe this is a known issue for this video card) but doesn't jump.
I've repaired permissions, rebuilt things, etc (using Onyx and also applejack) but no change.
After my previous mac died prematurely I was sure to get Applecare for this iMac and need to take it back anyway (the dvd-burner has predictably failed) but I I was surprised I'd never heard of my pixel jumping problem before.

More than likely somehow 'Zoom' got turned on.
To disable Zoom, open System Preferences->Universal Access preference pane and disable Zoom.
Mac OS X 10.4 Help: Setting zoom options for viewing your computer screen

Intel imac display glitch and involuntary restart

Just want to know if anyone else has experienced this specific problem, there are plenty of complaints about intel imac displays but I can't be bothered to sift through them all trying to find a match for my problem.
A couple of months ago I was watching a video in quicktime and noticed that my screen was glitching and flashing fragmented diagonal lines - like a commodore 64 loading type thing. Then the spinning-ball came up and a force quit didn't do anything so I had to force shut down. I started up and it occured again. Then the screen went blank/black, but still lit up, and restarted without me doing anything. It also got stuck during start up the second time this occured. I panicked and ran out to buy a 500GB external drive, backed up all of my work and then re-installed mac osx from disk, archive and install job. This seemed to sort it and for the following two months it seemed OK. No sign of any problems.
Since then I have updated from 10.4.7 to 10.4.10 (which I have suspicion that it screwed the firmware in my motu 828 firewire audio interface, costing me a £130 repair - but that's another painful story).
It happened again tonight (the screen thing, not the motu). And the ball came up and I couldn't do anything. Force shut down, restart - screen glitching again. Then I had 2 unexpected restarts, one getting stuck in startup. Then a successful startup but accompanied by the glitchy graphics, mainly red/pink pixellated diagonal lines flickering in and out. I ran a disk first aid - no problems. Did a disk permission repair. Shut down and ran a hardware test, the first few minutes of the test the screen was still at it but then stopped glitching, hardware test found no errors (it was an extended test too). Now I'm back on it and it's all OK.
Any suggestions/similar stories?
When it occured 2 months ago I had the original ram that came with the imac. Now I have 2x1GB sticks of crucial ram.

That's it! Well, that's what I have. Unfortunately, I don't know about the cause, but I don't ever recall having it prior to an update going back about a year ago. I recall an update, and that update being immediately followed by some sort of Apple Graphics something-or-other. I feel pretty certain that's when I first noticed this. I just had my LCD replaced for another reason, but I think you'll agree, it's not an LCD issue. In my case, browser activity, scrolling up or down in a page, seems to be the most common trigger. I've also seen "pieces" of the torn page, on the screen when minimizing the browser to the dock (usually Firefox, but I think I've seen it with Opera and Safari too). Is there a way to find update packages installed somewhere? I'd know it if I saw it, and I'd definitely try removing that suspect package/update.
Message was edited by: geekboy2000 - corrected OS

IMac display getting yellow when external display is attached?

Hi,
I have a problem with my IMac (27'' Mid 2010):
I have an external TV attached via MDP->DVI->HDMI cable. When I turn on the TV, the iMac recognizes it and the iMac display turns blue shortly, then the desktop returns and my TV is ready.
What I noticed: After the desktop returns, the iMac sometimes suddenly becomes "more yellow". Don't know exactly how to describe it, but I can clearly see how the desktop returns and then suddenly the imac display turns a little yellow, could also be that the display just gets a little darker (although the display brightness is the same as before). it's nothing that really disturbs me, and although I never saw the color return to normal it does (but I think only after rebooting the iMac)
anything on this? anyone else noticed that?
Message was edited by: nachdenki

Hi nachdenki
I've used both TV's and Monitors with my iMac over the years and that default iMac Profile has always looked yellow in comparison. Try one of those other sRGB, RGB Profiles or create a new Color Profile for the iMac's display.
http://www.computer-darkroom.com/colorsync-display/colorsync_1.htm
Dennis

New iMac display on/off

Does the new iMac have an on/off button for the display that is separate from the on/off power button for the iMac itself?
It would be nice to have the ability to turn off the display, when not in use, without having to powering down the iMac.

Sleeping the entire machine is one thing. Sleeping the display is a separate issue.
It seems there's currently no way to PERMANENTLY turn off the display backlight on an iMac. Setting a display time-out in the energy-saver settings or Ctrl-Shift-eject is supposed turn off the backlight, but if you have applications running on the machine, the display will turn itself back on again after a few seconds. (Try sleeping in a room with an iMac display on. Even displaying a black jpeg with the brightness turned down, you'll need to physically cover the screen!) The backlight will normally power down properly when there's nothing running on the machine, but if the machine weren't doing anything, I'd just sleep the whole machine, not just the display!! I want to sleep just the display/backlight when there are time-consuming applications running in the background, i.e., if the machine is encoding, running backups, syncing with cloud/server drives, etc.
This thread shows many other people having the same problem:
http://mac.elated.com/2007/02/02/why-cant-you-turn-off-the-screen/
It seems this has been a problem for well over a year and I've not even seen Apple acknowledge the issue. IMHO, not being able to leave applications running with the backlight turned off is a critical design flaw. If I'd known this in advance, I'd have bought a Windows PC Now regretting my iMac purchase...

New iMac 24" pixel pitch?

The new iMac puts 1920x1200 pixeles in 24". One of the cinema displays puts 1920x1200 in 23". If aspect ratio is the same, then the iMac display's pixel pitch should be not as good as the cinema display or perhaps even the 20" iMac. Is this correct? If so, 24" owners, does it make a noticeable difference? Thanks

24" vs 23" - .2692 vs .258, or a difference of 4 percent
Personal computer users will usually want a .28 pixel pitch or finer (lower number), and on that comparison, if your measurements of 23" and 24" are accurate, both displays are superior to the majority of displays in use.
Do you believe 4 percent to be noticeable? Those ratios are both within the comfortable range.
It is hard for me to believe that 23" and 24" are the exact measurements, anyway.
What are the exact measurements of the displays to which you are referring? With that infomation the pixel pitch can be more accurately calculated.
Message was edited by: myhighway
Message was edited by: myhighway

Can't read iMac display

My imac display is unreadable. Everything looks pixelated and blurry with the resolution set to 1680X1050. It has the Radeon X1600. Tried font smoothing and changing the resolution but it didn't work. Also hooked up a second monitor and the image looked perfect on that one. When you zoom in on the imac its readable, but still does not look up to par. Any help would be greatly appreciated.

HI and Welcome to Apple Discussions...
Try Resetting the PRAM
If that doesn't make a difference, might be a good idea to run the Apple Hardware Test
Carolyn

Colour Calibration / White Point setting - Is Imac Display really professional quality

I am trying to calibrate my imac 27" using i1 Display2 calibration software. I am trying to set a traget of 6500 using the software but it advises the current is only 5600 and suggests moving the RGB sliders to get this current white point up to my 6500 target. Unfortunatly i have no idea where i find these sliders on my imac. Can anyone advise how i change my current white point to get to the 6500 target?
Also, on the brightness issue, does shades work to reduce my brightness or will it simply interfere with my colour calibration?
Finally, i was going to use my iMac for professional photography. (Mainly on line but some print work required). Honestly, is the iMac display up to the job or should i consider changing
Thanks
Gary

Corbybhy, the glossy screen is the biggest and silliest myth out there. Really.
I have been a professional art director & designer for over 26 years, and by the way, for many years my high end professional CRTS were made of glass (and glossy). Another myth is that the screens cannot be calibrated, and are too bright. Hogwash. I use Spyder3Pro and have had few problems, guessing your device will be the same. Actually, the monitors seem to stay consistant for a heck of a lot longer than the old high end CRTs did. In the old days, most professionals calibrated to 5000k, but these days 6500k is the standard.
The amount of MISINFORMATION that is being spewed always amazes me. If you can keep your lighting consistant and somewhat dim, your life will be easier. Reflections are simply not a major issue, and are also overblown as a issue (by the way, my iMac sits next to a window, I just use shades to dim the ambient light).
I work mostly in print, and produce mostly publications, advertising & marketing materials. I have ZERO issues with my screen matching my proofs. ZERO. I do a huge amount of imaging, retouching & post-processing... all from my 27" iMac.

IMac displays a black screen during installation of Windows 7

I tried to install windows 7 on my imac 27" but imac displays a black screen during installation of windows 7.
I also tried to install it as apples instruction of http://support.apple.com/kb/ts3173 but it failed.
Any solution please.. thanks
I have a late 27" imac with OS X 10.85

Here is an over-simplified explanation of WIM and CLG files. Assume your DVD Media contains
W7- Ultimate
W7- Professional
W7- Home Premium
W7- Home Basic
WIM Files
File1
y
y
y
y
File2
y
y
y
y
File3
y
File4
y
y
File4
y
y
y
The File .wim will contains a compressed image which contains File [1...5].
The W7-Ultimate .clg will have 5 entries, with all set to 'Y'.
The W7-Professional .clg will have 5 entries, with 'Y','Y','N','Y','Y'.
The W7-Home Premium .clg will have 5 entries, with 'Y','Y','N','N','Y'.
The W7-Home Basic .clg file will have 5 entries, with 'Y','Y','N','N','N'.
This allows a single .wim Image file on the DVD media to be used to install any of the 5 flavors of Windows. When you enter your product key, the Installer knows what specific W7 variant you have the key for and will tell the WIM to extract the specific files the installer needs to be extracted.
The following line
<cpi:offlineImage cpi:source="wim:d:/sources/install.wim#Windows 7 ULTIMATE" xmlns:cpi="urn:schemas-microsoft-com:cpi" />
is telling that a retail product key will be entered, which should go look for this specific .clg file (from the five you already have on disk). You can test if it will work for you by changing this line to the following
<cpi:offlineImage cpi:source="wim:d:/sources/install.wim#Windows 7 PROFESSIONAL" xmlns:cpi="urn:schemas-microsoft-com:cpi" />
If it does not work, the other issue can be related to device discovery. Typically A: and B: device names are reserved for Floppy Drives. C: is your internal HDD.
D: can either point to the Optical drive, or the USB. The normal convention is that the removable media is named from Z: backwards. Y: and Z: are usually used for Network drives, so X: should be your USB. First try with the change to "Professional". If it does not work,

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I have an iMac G5 which is having some issues with video mirroring. When I try plugging a TV into it via the Apple video adapter, the imac display flickers, indicating it has adjusted to the new display, but there is no image on the TV. The System Preferences indicates that there is a "VGA Display" attached. (I believe that is supposed to say "NTSC/PAL." That is what my PowerBook says in any case)
Now however I have a new problem. The Apple Video Adapter is unplugged but the iMac still thinks that the "VGA Display" (actually the apple video adapter) is plugged in. It is stuck at a certain resolution (1028x768) and if i put it at a higher resolution it still shows only 1028x728 pixels, except now they are in the middle of the screen with a black border around it. (I believe this is normal behavior.... for when a TV is actually attached)
Any ideas? Both for the first problem (iMac thinks TV is a VGA Display) and the second (iMac thinks there's an external display attached when there is not). Thanks.
iMac G5, 1st Gen 1.8 GHz 17" Mac OS X (10.4.4)

Im having the same issues and would like to know if there is a solution...its driving me crazy!

Has anyone calibrated an iMac display?

I just purchased my first iMac. My previous displays were CRT monitors and I was able to calibrate them with the Eye One Display 2 from Mamiya/Gretag Macbeth. There are no adjustment buttons to fine tune the color temperature on the iMac. Has anyone had any success running calibration software of their iMac display? As a photographer, I need to know that what I see on my monitor is accurate color so my prints will match what I see when they come back from my photo lab

Hi,
the new iMac has a glass surface which makes it hard to calibrate with mostly every older calibration tools.
I now use the new Datacolor Spyder3Pro which works perfectly on my iMac. It has been specially designed for glossy display, LED backlight and wide gamut screens...
It's also doing a fine job on my MacBook Pro with LED backlight, where my Eye1 failed before.
Just my 2 cents...

IMac dead pixel

I Think my Imac has a dead pixel. It's the latest iMac 27 inch display and it has a black mark on the screen. If I take it to apple what will they do?

If I take it to apple what will they do?
We cannot second guess what Apple will do, however you should go in educated about their policies on dead pixels. They like most manufacturers will not replace a display for a single dead pixel however if there are number of dead pixels that negatively affect the appearance they are likely to replace the display.
About LCD display pixel anomalies for Apple products released in 2010 and later

RECALL on 27" iMac Display due to Dimming?

Following is a copy of a message I sent to Apple about my iMac. I am very frustrated about this issue and I seriously think it warrants investigation, I have found many cases of this online, anyone else have this problem here?
I have had an issue with my 27" iMac display for quite some time, because I thought it was a software issue with the "auto dim" I did not notify anyone about it. however, I brought it into the Apple Store in the Domain in Austin Texas at the end of January to have the hard drive replaced under the recall. While there I mentioned to the young lady at the Genius Bar that my display would dim just slightly, and I thought it was a setting issue, she said they would look at it, but most likely it would be resolved with the replacement of the Hard drive. Ok, new hard drive, new OS, makes sense. When I returned to pick up my computer, the rep said they ran diagnostics on it and could find no problems, however when I got home, it was still happening, I took it back to the Apple store on Feb 16 and was told there was a problem with the displays and it needed to be replaced for approximately $520.00, because it was out of warranty by 134 days. Upon further research I have found that this is not a random occurrence, and there are MANY MANY cases of this exact problem scattered throughout the forums, and Ironically they all seem to be on the left side of the screen. I find it hard to believe that a computer that costs almost $2000.00 can have a display go out in a little more than a year. I think that you should look seriously at the issues these displays are having, this should be a recall, at the very least voluntary. There is no reason that a display should fail in this amount of time. I want you to understand, I am an Apple guy, I was born and raised on windows, but became a die hard Apple guy after I received my first MBP as a hand me down from a friend. I have owned every single iPhone there is, Have two Mac Book Pros, iPad, six iPhones, and this 27"iMac. I am a pro photographer and this is seriously a problem. PLEASE look at this issue, I will not buy another Apple product until this is resolved. There are way too many failures out there for this to not be a defect.

I understand your frustration; however, these forums are user to user only - no Apple employees here. If you wish to contact Apple, either use any of the contacts on this page:
http://www.apple.com/contact/
or use the feedback method:
http://www.apple.com/feedback/

2.16 iMac display making popping noise

Hey guys,
My imac display has been making these "popping" noises that are very faint when the screen dims and when the screen goes to a screen saver (it does it for all different screen savers).
Its like a ticking sound and theres about 3 ticks per second.
The screen is as bright as ever so I'm not sure whats up. I'll leave the screen idle for a few mins, then it auto-dims and the ticking starts.
Anyone ever hearad of this?

use ASP and check the ST hard drive ie Seagate. If assembled in china and firmware version 7.01 ; then you best save your data asap because the hard drive is going to crash with no possibility of data recovery.

IMac display pixel brightness fail

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