Hmm...you sure about that? I have an older ACD 23" that still works and looks great. Why would a larger monitor be the sole factor into what causes this? Again, if they were like the monitors I am using now it would be a total non issue for me.
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27-inch iMac - Yellow Tinge
- Thread starter Davieis
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Hmm...you sure about that? I have an older ACD 23" that still works and looks great. Why would a larger monitor be the sole factor into what causes this? Again, if they were like the monitors I am using now it would be a total non issue for me.
I've never had a perfect screen over 20"...
Dell 2407WFP, gets significantly darker on the rightmost 4" or so. It's a gradual change, much like this yellowing problem. I heard about many of these kinds of issues, and saw a few pictures after researching the problem, so I feel this issue was fairly common, as far as issues go.
The HP LP2475W, which I only considered owning, had numerous reports of a Magenta > Normal > Green gradation in color temperature from one side to the other. I saw many photos and decided not to get it.
My 23" ACD had severe burn-in issues. Not supposed to happen at all, due to the nature of LCD but it did. If I left a window sitting for more than 5 minutes, I could move it and see the remnant of it burnt into the screen. It'd vanish in about 10 minutes.
(Two of those mentioned were IPS and one was S-PVA, if anyone's keeping track)
If I had to describe my issue by the limits of these forums, I'd say it's less a problem with a yellowing, as it's a tendency toward blue-ishness. I much prefer the yellow areas to the darker, less contrasty blue areas. Here's how I'd map it:
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*** The color temperature changes are MUCH less noticeable than this graph. I'm limited to too few colors! Also I calibrated above the middle slightly, so that I'd have less blue-ishness and more yellow. I don't mind the yellow. Again, I do mind the "cool" temperature of the top and left corner, it is not contrasty enough for me.
At this point, I still feel like sticking with what I've got. I lucked out in every other regard. No DOA, no cracks, no flickering, no HDD sound, nada. If a panel is actually ever produced with NO yellowing, and many iMacs start popping up with NO yellowing, maybe I'll demand a screen replacement.
good news bad news
well i asked my friend that has a 24 lg led screen working on his recently pc. guess what? he has exactly the same yellowing problem. seems like it's not isolated on new imacs. seems like a defect on led technology
EDIT: just found out some more clues on the cause of the yellow tinge in general. check out this new post
https://forums.macrumors.com/threads/829676/
well i asked my friend that has a 24 lg led screen working on his recently pc. guess what? he has exactly the same yellowing problem. seems like it's not isolated on new imacs. seems like a defect on led technology
EDIT: just found out some more clues on the cause of the yellow tinge in general. check out this new post
https://forums.macrumors.com/threads/829676/
Also have the yellow tinge on my W8948XXXXXX 27" iMac
...and its pattern is just like what jonwd illustrated in his post above. Here's a photo of my computer -- this picture shows it worse than it actually is, but you get the idea.
FWIW, there's no way that the magnetic fields from the iMac's speakers are causing this issue...magnets affected CRTs significantly, but they won't mess up an LCD display.
I'm also leaning toward keeping my current iMac. I've already had to return one because of the flickering issue, and it's pretty evident that this yellowing deal is a pretty widespread problem and it likely simply a limitation of the display's technology. My computer is flawless otherwise (no dead/stuck pixels, quiet hard drives, and no flickering...yet) and I know the likelihood of getting one that's significantly better is pretty darned low.
I'm comforted that other critical folks have also decided to keep their yellow computers. My wife thinks I'm nuts for wanting to try to swap this one out, but I tend to be overly anal about my toys.
...and its pattern is just like what jonwd illustrated in his post above. Here's a photo of my computer -- this picture shows it worse than it actually is, but you get the idea.
FWIW, there's no way that the magnetic fields from the iMac's speakers are causing this issue...magnets affected CRTs significantly, but they won't mess up an LCD display.
I'm also leaning toward keeping my current iMac. I've already had to return one because of the flickering issue, and it's pretty evident that this yellowing deal is a pretty widespread problem and it likely simply a limitation of the display's technology. My computer is flawless otherwise (no dead/stuck pixels, quiet hard drives, and no flickering...yet) and I know the likelihood of getting one that's significantly better is pretty darned low.
I'm comforted that other critical folks have also decided to keep their yellow computers. My wife thinks I'm nuts for wanting to try to swap this one out, but I tend to be overly anal about my toys.
...and its pattern is just like what jonwd illustrated in his post above. Here's a photo of my computer -- this picture shows it worse than it actually is, but you get the idea.
FWIW, there's no way that the magnetic fields from the iMac's speakers are causing this issue...magnets affected CRTs significantly, but they won't mess up an LCD display.
I'm also leaning toward keeping my current iMac. I've already had to return one because of the flickering issue, and it's pretty evident that this yellowing deal is a pretty widespread problem and it likely simply a limitation of the display's technology. My computer is flawless otherwise (no dead/stuck pixels, quiet hard drives, and no flickering...yet) and I know the likelihood of getting one that's significantly better is pretty darned low.
I'm comforted that other critical folks have also decided to keep their yellow computers. My wife thinks I'm nuts for wanting to try to swap this one out, but I tend to be overly anal about my toys.
My wife is the same way. Sees no reason what so ever to switch it out. We've been to the Apple Store about an hour away three times this week. The first imac had dust under the screen and much worse yellowing than this one. We were debating on returning this one and my iphone decided to quit on me so that goes back tomorrow. I told her might as well take the imac along for return but she still sees no reason to return it.
I went to buy a iMac 27" today and in the Netherlands you can't buy them at the moment. They told me production in China stopped at the moment to solve all problems with the new iMac. The predicted that it will at least take more than 2 weeks before the "NEW SERIE" 27" i MAC's will be available !!!!!!
Sounds to me like they're feeding you a line. The base 27" iMac in the US Apple Store ships in 5-7 business days and the quad-cores ship in 7-10 days. My replacement took almost precisely the amount of time to ship as the store said that it would...the point being that nothings going to ship in 5-10 days if the factory production has shut down.
Not true. The i7 machines are built-to-order. In other words, if you order one today, it'll be built in the next week or so such that it can be shipped to you within 7-10 days. That'd be hard to do if the factory was shut down!
You are absolutely correct. Production is apparently shut down in China. Those who have purchased a new iMac are stuck with the "old" new iMac and will be forced to have their computer repaired under the warranty if and when it begins to flicker.
It looks like the only new iMac's that will be available this month will be the first batch of "old" model iMacs. Hopefully the new iMacs which will probably start to appear around Christmas will not exhibit the same problems as the "old" iMacs.
Reseller email.
"Just a follow up update on the iMac order. Apple has identified a production issue with the graphics cards in the machines with quad core processors. This has resulted in machines with flickering screens or video problems. Many users that have received machines already are having these issues. Apple has re-worked the video card to resolve the issue, but this has created a delay on the orders.
Any machines that are currently available at stores will be the older models and will likely suffer from the flickering video issue. This would be resolved as a warranty repair on the machine.
We will keep you updated with any information regarding shipment of your order."
Source please? Seems like I read this exact same thing over on the Apple support forums a couple weeks ago.You are absolutely correct. Production is apparently shut down in China. Those who have purchased a new iMac are stuck with the "old" new iMac and will be forced to have their computer repaired under the warranty if and when it begins to flicker.
It looks like the only new iMac's that will be available this month will be the first batch of "old" model iMacs. Hopefully the new iMacs which will probably start to appear around Christmas will not exhibit the same problems as the "old" iMacs.
Reseller email.
"Just a follow up update on the iMac order. Apple has identified a production issue with the graphics cards in the machines with quad core processors. This has resulted in machines with flickering screens or video problems. Many users that have received machines already are having these issues. Apple has re-worked the video card to resolve the issue, but this has created a delay on the orders.
Any machines that are currently available at stores will be the older models and will likely suffer from the flickering video issue. This would be resolved as a warranty repair on the machine.
We will keep you updated with any information regarding shipment of your order."
Those that purchased the first batch, are so out of luck, especially if they were naive and did not return their computer within the first 14 days.
It is apparent that the late 2009 iMacs will now have a
stigma which will affect their future resale value. Would you purchase a used late 2009 iMac?
Those that purchased the first batch, are so out of luck, especially if they were naive and did not return their computer within the first 14 days.
It is apparent that the late 2009 iMacs will now have a
C'mon man, don't start polluting this thread too. My replacement hasn't flickered yet, but it's only been about 1.5 days, so it could easily crop up in the next few days. If it does, it's going back, just like the first, and I'm getting a refund until Rev B comes out.
Again, what's your source for the manufacturing delay?
You will find that I am right in due course. I would not wish to own a late 2009 iMac, especially one of the "old" models which could very well be a ticking time bomb just waiting to flicker. But hey, that is just me.
So what if they do flicker? If someone owns an iMac that starts acting up outside of the 14 day return window, they'll simply get it repaired. If, as you've suggested, Apple's actually shut down production to address the flickering problem, then presumably they've identified the cause and the fix, and there's no reason they couldn't retrofit existing iMacs with the fix.You will find that I am right in due course. I would not wish to own a late 2009 iMac, especially one of the "old" models which could very well be a ticking time bomb just waiting to flicker. But hey, that is just me.
I don't like the prospect of my iMac starting to flicker sometime in the future, but as far as resale value goes, I think you're being a little alarmist.
Of course, all of this talk about the flicker has nothing to do with the topic of this thread which is the yellow tinge. Unfortunately, the yellow tinge appears to be an unfortunately by-product of IPS LCD technology -- some monitors just have the issue more than others. I doubt that Apple's going to retool their production line for the yellow tinge issue.
You are absolutely correct. Production is apparently shut down in China. Those who have purchased a new iMac are stuck with the "old" new iMac and will be forced to have their computer repaired under the warranty if and when it begins to flicker.
It looks like the only new iMac's that will be available this month will be the first batch of "old" model iMacs. Hopefully the new iMacs which will probably start to appear around Christmas will not exhibit the same problems as the "old" iMacs.
Reseller email.
"Just a follow up update on the iMac order. Apple has identified a production issue with the graphics cards in the machines with quad core processors. This has resulted in machines with flickering screens or video problems. Many users that have received machines already are having these issues. Apple has re-worked the video card to resolve the issue, but this has created a delay on the orders.
Any machines that are currently available at stores will be the older models and will likely suffer from the flickering video issue. This would be resolved as a warranty repair on the machine.
We will keep you updated with any information regarding shipment of your order."
Well what sounds strange in that email is the fact that they mention it only affects quad core machines. Today I have seen this flickering for the first time in the flesh so to speak. This was in my local electronics superstore (Comet) and this was on a dual core base 27" imac.
So far, there is nothing official that indicates the email in question is, in fact, an actual email from someone who knows what is happening. If you have a grain of salt, take it when you read that email.
It is highly doubtful that Apple can correct all of the problems with the new iMac during the production run hiatus. They are under extreme pressure to produce so as to meet their sales numbers for the holiday season however they are also under extreme pressure to keep knowledge of the problems under wraps so as to not scare off potential purchasers.
Supply is drying up and resellers are raising prices. On the other hand only the uninformed are purchasing at this time. If Apple can push back delivery to a date closer to Christmas then they can stifle the chorus of complaints until after the holiday selling season. I expect that we will be reading many new complaints in January.
Unfortunately Apple did not choose to install a high quality screen in the new iMacs thus many screens are plagued by the yellow tinge issue. The new iMac's use a cheap "White" LED back lit screen instead of the more advanced Red Green Blue RGB LED back lit screens which HP developed in conjunction with Dreamworks and which are now being rolled out in HP and Dell computers.
Apple gambled that the average consumer was too unsophisticated to recognize the difference and they clearly lost the bet. If too much yellow phosphor is added to a blue LED so as to produce a "white" LED then the end result can be a (yellow sweat stained undershirt) area on the LCD screen directly over the defective "white LED's).
RGB LED based backlit screens use three separated colors (red, green, blue) contrary to the white ones (WLED) which use one (usually blue diode covered with yellow phosphor). They have significantly higher color gamut compared to white LEDs and standard CCFLs. In other words, better image quality, truer/richer/deeper.. whatever color. The white LED screens have a color gamut of 45% NTSC or Adobe RGB, the RGB LED screens are closer to or exceed 100%.
http://www.youtube.com/watch?v=S5acfjWnf-k&feature=related
Bluebermuda, do you have knowledge of these problems or is this all conjecture? Obviously some people are having problems, but the way you talk, no iMac would ever really be worth buying...
You are absolutely correct. Production is apparently shut down in China. Those who have purchased a new iMac are stuck with the "old" new iMac and will be forced to have their computer repaired under the warranty if and when it begins to flicker.
It looks like the only new iMac's that will be available this month will be the first batch of "old" model iMacs. Hopefully the new iMacs which will probably start to appear around Christmas will not exhibit the same problems as the "old" iMacs.
Reseller email.
"Just a follow up update on the iMac order. Apple has identified a production issue with the graphics cards in the machines with quad core processors. This has resulted in machines with flickering screens or video problems. Many users that have received machines already are having these issues. Apple has re-worked the video card to resolve the issue, but this has created a delay on the orders.
Any machines that are currently available at stores will be the older models and will likely suffer from the flickering video issue. This would be resolved as a warranty repair on the machine.
We will keep you updated with any information regarding shipment of your order."
if thats true and its happening in the UK then Apple are trading illegally.
This post has me seriously reconsidering my purchase. Where are you getting this info?