New iMac 21.5" Yellow tinge, Screen Flicker, Screen Whistling Noise, etc...

Have already posted on other threads, but to ensure that it is recognised that there are 21.5" issues will repeat here.

I had a Wk 42 21.5" with high pitched whistle problem. Purchased in Nov, took back to local Apple Store last week. No problem at all in obtaining a swap. However this machine Wk 03 definitely has yellow tinge - predominantly lower right hand corner. I believe that my first machine had a very slight case of it on the bottom edge, but there is no doubt about this one. I have logged it with Tech Support Line and have a case ref number and will take it back in maybe 3 or 4 weeks time for a further swap.

This post on another forum (Gizmodo) sounds very plausible to me:

I now am fairly certain that the yellowing of the display is a manufacturing defect involving the distance between a layer of material used to diffuse the LED backlight and the LCD panel. To show a perfectly even color, this light scattering panel has to be absolutely flat and free of any warping, kinking, or thickness defects. It is this layer that I believe is at fault, and causes the color to drift and give the perception of yellow stripes, fields, and corners.
This would be absolutely consistent with the reports of horizontal and vertical stripes (a vertical or horizontal kink) or corners (a bad tuck). I believe these defects may not appear in the factory. Rather, with the rough handling the monitors receive when shipped this layer gets knocked out of alignment.
I don't know what Apple could do to solve this problem, other than a wholesale change of manufacturer for the panels, or a complete redesign of the panels themselves to better pin the diffusion layer.
It also explains why my careful assembly and dis-assembly resulted in the yellowing disappearing. By being cautious, I basically returned the monitors to the original factory state of perfect alignment.

My iMac: yellow screen, noisy screen and noisy hard drive (seagate)

:$

Hi,

bought iMac 21.5" NVIDIA from Apple Store online on Black Friday

#1: Week 49, whistling (fixed by replacing mother board), yellow tinged screen discovered after 3 weeks
#2: Week 02, clicking and yellow tinged
#3: Week 04, yellow tinged

Never had any screen flicker/tearing/shutoff until now.

I'm also coming from other threads devoted to 27" iMacs (screen noise, yellow tinge, flicker).

make sure anyone with a 21.5 yellow screen issue or any other issue that is common, call and complain to apple support, they say it is not an officially known issue, so call and lets make it an issue.

I stated my complain also in the 27 inch, but I repeat it again in this thread:
Mr. Apple, my *21.5 inch iMac* has a yellow tinge! Produced in week 42. So do something for the 21.5 inch owners, also in the Netherlands.

Well this is my first post, and also my first Mac. I bought a Mac Mini down in Regent Street in January after wishing to make the jump from Windows for a long while, I discovered a week later that it had a colour banding issue (checked with three different monitors, and three adapters) - back it went. I decided to pay the extra money and take away an iMac instead of a replacement Mini.

Alas this iMac has a *yellow tinge*. Most predominant in the bottom left; I can't just live with it as, well, I can't stop staring at it now, but more importantly I do a lot of web design/photography - things that require accurate colour reproduction.

*It's a 21.5" iMac with nVidea graphics. Week #51.*

Also, I live in Newcastle - I made the trip to Regent Street as I was visiting my parents in Newbury. I had to drive 140 miles to get the iMac in Manchester. And to be quite honest I'm incredibly annoyed these faulty units have been shipping since October.

Listen up Steve, I've even considered a full refund and buying a new Windows 7 machine with the money. For someone making the switch to the lovely word of Apple, it's been nothing but a nightmare. A replacement will probably be faulty, and there's obviously no known repair - it's a joke.

Hi,

After reading great things about the iMac i thought i'd purchase my 1st mac due to getting annoyed with all things Windows so thought i'd make the jump to Apple, well now i'm not too sure!

I received my 21.5' iMac yesterday but it has the yellow tinge issue from the bottom third of the screen down, its slightly more prominent on the bottom left hand side of the screen but also noticeable on the right hand side. I have a week 51 machine with the ATI card.

Annoyingly i'm starting to think to myself should i just put up with it as it seems from the forums that replacements are coming back with the same issue, but then i think b ***ks, Apple are marketing this as the ultimate display (one of the main reasons i went for the iMac in the 1st place) and i'm not paying £1300 just to settle for something that is fundamentally just not right.

Its a real shame as what i have experienced using OSX 10.6 so far has been amazing, just a shame the hardware can't match that.

Is it worth contacting Apple support now and risk not having a machine for a week or so getting a replacement only to have the same problem, or hold off until a permanant fix has been released?

Cheers

call apple support and complain, they say that the 21.5 screen is not a known issue, just the 27, more people have to call about the 21.5 to make it an issue!

No screen flicker, and the HDD is fine. It's literally just the yellow tinge to this point. But that's still a big disappointment 😟

Just a quick question for you guys, can an iMac be replaced at an Apple 'shop'? We have no retail stores in Newcastle (not until Spring) but plenty of Curry's/PC World/John Lewis outlets. Am I able to obtain a replacement at one of those?