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  • Schwa72 Level 1 Level 1 (15 points)
    TB-he-he-he wrote:
    Here is what I have seen:

    I got my i7 on 11/23/09. No flickering or such.

    I noticed the yellow tinge almost right away but also noticed that when you tilt the monitor up, the yellow tinge goes away. It seems to be an issue with the angle at which you view the screen. This is a "viewable angle" issue, probably made worse by the gloss/glass panel.

    I am keeping my computer as of now-it's the best one I've ever had.

    Perhaps on your machine it's a "viewable angle" issue, but I can tell you that's not the case with my (and, I suspect, the majority) iMac.
  • fonso Level 1 Level 1 (0 points)
    My replacement 27" (week 50) arrived yesterday. Same experience as TB-he-he-he's: very slight bottom yellowing that goes away by tilting the display.
  • NoleDevil Level 1 Level 1 (0 points)
    Joining the club. Have had the imac for about 3 weeks and noticing the yellow tint and general splotchiness across most of the screen, particularly when viewing black backgrounds. Tried the monitor test link off of one of the appleinsider articles and the was a pretty significant yellow gradient across my display. Waiting for mac to figure this thing out and when they do I'm requesting a repair. This is my first mac and I'm overall extremely happy with it, but the monitor issue is starting to affect my opinion. Hopefully, they'll fix this problem- soon.
  • Mingletron Level 1 Level 1 (5 points)
    I received my i7 yesterday and it has a yellow tinge bottom right as well as dead iSight pixels and some marks behind the screen. What are my options I think that getting a replacement will take a long time and is a bit of a gamble. The screen has no dead pixels, does not squeal or flicker and the fans are quiet etc.
    For the money I expect a perfect display as I will be photo editing etc.
  • Kurukuru Level 1 Level 1 (0 points)
    I bought my first 27" iMac from the Apple Store online. It had a mis-coloured pixel near the middle of the display, so on a white background you'd see a green/blue dot.

    The replacement arrived yesterday (just over a week from arranging it). It has a yellow tinge in the bottom half of the screen, so when you move a white window down from the top, it changes from clean and bright to a dirty yellow. This is unusable when tweaking colours in photographs.

    The screen also glitches every few minutes (horizontal bars flash across the display).

    I've arranged a refund. I'm not going to pay over £1,300 for something that doesn't live up to Apple's own hype.

    The Apple Care representative suggested I go to my local Apple Store and examine a new machine before buying it, to make sure it's not faulty. I've lost patience and confidence in them, so I won't be doing that. If they sort out their manufacturing problems, I may buy a new machine in a few months.
  • Glenn De Backer Level 1 Level 1 (0 points)
    Gizmodo has a picture that clearly displays the effect the yellowness has

    http://gizmodo.com/5424639/i-spoke-too-soon-my-imac-is-ed-too

    I so hope that Apple can fix this problem. The money for an 27" i5 is ready to spend, but that will only happen when they fix this problem.
  • boynthemiddle Level 1 Level 1 (0 points)
    Fonso, good to hear you received your new machine. Sorry that it's not flawless as it should be.

    I had similar dirty, yellow tinging on the bottom third of my screen. It also had some serious "over brightness" in the blacks in the lower right-hand corner. Some people have been referring to this as "backlight bleed". I don't know if that's technically what's going on, but the blacks look very bright and grey in this spot. Looking up at the machine by sitting far below it, the area looks fine... as if the pixels are facing the wrong direction so that they look like I'm looking at them from an extreme angle when sitting in the proper viewing angle.

    Apple is exchanging my 27" i7, as I was in the 14 day period. The Self Support rep said that my new machine would ship 24 hours after I check the old machine with FedEx to be sent back (which I'm doing this evening). I've read other people hearing similar information when exchanging their machines, but has this turned out to be the case? With the shipping times slipping to two weeks, I didn't know if I'd go in queue like a new order or towards the front of the line. I'll be bummed not to have it over my Xmas holiday, but I'd really just like to know the truth about when I can expect to have my machine back.
  • Schwa72 Level 1 Level 1 (15 points)
    boynthemiddle wrote:
    Fonso, good to hear you received your new machine. Sorry that it's not flawless as it should be.

    I had similar dirty, yellow tinging on the bottom third of my screen. It also had some serious "over brightness" in the blacks in the lower right-hand corner. Some people have been referring to this as "backlight bleed". I don't know if that's technically what's going on, but the blacks look very bright and grey in this spot. Looking up at the machine by sitting far below it, the area looks fine... as if the pixels are facing the wrong direction so that they look like I'm looking at them from an extreme angle when sitting in the proper viewing angle.

    Apple is exchanging my 27" i7, as I was in the 14 day period. The Self Support rep said that my new machine would ship 24 hours after I check the old machine with FedEx to be sent back (which I'm doing this evening). I've read other people hearing similar information when exchanging their machines, but has this turned out to be the case? With the shipping times slipping to two weeks, I didn't know if I'd go in queue like a new order or towards the front of the line. I'll be bummed not to have it over my Xmas holiday, but I'd really just like to know the truth about when I can expect to have my machine back.

    Your order is "released for processing" once FedEx receives the old machine. The replacement probably won't ship for two weeks or so after that. Basically, it's like your order is placed once FedEx receives the old machine. At least that's what my experience has been.
  • TB-he-he-he Level 1 Level 1 (5 points)
    @Schwa72

    I also turned the brightness all the way up and still see the yellow tint... this is totally an issue with the LED backlight LCD and glass. The crystals are refracting the LED light in a way not intended. The top is blue, the bottom is yellow, and as you tilt the screen the bottom becomes more blue and the top becomes more purple. Try this- the further you sit from the screen the more uniform the color across the screen- all white.

    That's what I think.

    I still love my iMac.
  • TB-he-he-he Level 1 Level 1 (5 points)
    btw... "the ultimate display"? The fact this was the main selling point really disappoints.
  • Jamooche Level 1 Level 1 (0 points)
    That is a possible cause. ifixit.com shows a teardown of the 27" iMac. I'm not about to take the glass off since I'm about to box it up for replacement after this post, but I wonder if the display can be used without the glass. It might look ugly, but be a good fix for the glare and (we hope) yellowing.
  • silvercrw Level 1 Level 1 (0 points)
    hmmm.... i am very curios if you remove the glass on the imac if they yellowing would be gone. Maybe the glass itself is discolored. Sounds dumb i know, but has anyone tried? At this point I think its worth it for someone to try:)
  • silvercrw Level 1 Level 1 (0 points)
    Guys.... this may be it,

    Look at the middle of your screen with a white backround displaying. Then tilt the screen upwards.... You will notice the screen is now uniform.

    The reflection of light onto the glass is causing the yellowing. I am telling you. If no one else tries it, i think i might
  • Jamooche Level 1 Level 1 (0 points)
    There is a slight difference, but mine's still funny in the lower right.

    I say do it! Just don't break the glass. It seems fragile from all the ones that arrived cracked.
  • BruinToo Level 2 Level 2 (445 points)
    Running the test of grays, my 27" i7 also have a bit of yellowing towards the bottom, but it's not so pronounced that it merits me returning the unit. I have no other problems with the screen (flickering, high pitch noises, crack, etc), and don't want to risk getting a bum unit. The yellowing also seems to disappear when I tilt the screen all the way back and the top seems to appear yellowish a bit. My eyes are really bad however, so they're not a good barometer. Ordered the iMac 11/1, shipped 11/13, received 11/19.
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