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Summary (2022 total)

Processor
3.06C2D: 46
3.33C2D: 14
2.66i5: 653
2.8i7: 1309

Screen Size
27": 2022

Graphics Card
4850: 2022
Batch (Week Built)
09-39: 1
09-42: 3
09-43: 8
09-44: 5
09-45: 84
09-46: 221
09-47: 214
09-48: 162
09-49: 139
09-50: 342
09-51: 103
09-52: 135
09-53: 58
10-01: 65
10-02: 25
10-03: 25
10-04: 57
10-05: 46
10-06: 35
10-07: 35
10-08: 39
10-09: 32
10-10: 22
10-11: 21
10-12: 15
10-13: 16
10-14: 19
10-15: 11
10-16: 13
10-17: 14
10-18: 9
10-19: 6
10-20: 1
10-21: 4
10-22: 3
10-24: 7
10-25: 3
10-27: 2
10-28: 2
10-29: 3
10-31: 2
10-32: 3
10-33: 2
10-35: 1
10-37: 1
10-39: 1
10-40: 1
10-42: 1
10-45: 2
10-47: 1
10-48: 1
10-52: 1
Condition iMac Specs Source Comments
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB After 1-2 hours of use, screen flickered for few time, quick screen blackout occured, worked fine for few more hours and happened again.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB Immediately after using my brand new iMac for about ten minutes I began noticing a white bar flashing horizontally at random. The problem progressed into the entire screen flashing black.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB 06awd
Flickering display 27" 2.66 Quad i5 ATI 4850 1TB Thrice06
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB Bill P. After running a few hours I also began getting screen flickering and intermittent black screen. This would be followed by horizontal lines about 1" wide towards the lower half of the screen. I rebooted and all was fine until this morning when it returned
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB GLM_BUF Used it all evening on Friday, all day Saturday and it was fine. This morning the flickering started after a half hour of use, then the screen now goes black every 30 seconds or so (4 times while writing this). Same behaviour , now bar has gone to the top... Read More
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB guitarguy09 However, the tech said that it may in fact be the video card and that apple engineers are "aware of the issue and are working on it". They reportedly are "leaning toward it being a hardware issue" right now but are still trying to identify the exact p
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB Invisidrew I've had a new iMac 27" with Dual Core (1TB drive) for about 18 hours now. And I've been noticing the flickering/banding almost from about one hour after startup. It's not horrible, but it's persistent enough to make me very concerned. The occassion
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB canyonblue Worked fine for about 2 hours now I get the flicker (bands, at various places for under one second) and screen blackening (total blackout for about 1 second) about once every 2 or 3 minutes. A simple reboot fixed nothing and I have not yet tried the pram ... Read More
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB MilehiJT
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB Schwa72 The first thing that happened was that I got a black horizontal bar flash across the screen, about 10 seconds later the screen went completely black for about a second, and finally, about a minute later, my menu bar jumped to the middle of the screen.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB Schwantz You can add one more 27" I7 to the list with the flickering and short 1 SECOND black screen. The part that really ***** is, i just got it this morning... first thing i did was update it...
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB eXodusSquared Everything was great until about 10 minutes in, the screen started to shift up about 1/2 a centimeter and made everything blurry as if it was ghosted/shrunk/distorted. It would do this on and off a few times then it stuck like that until I turned it off.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB Simon (UK) according to Apple, at this moment, it's not a firmware issue and they're treating it as a potential hardware problem. The directive for US and Europe is to replace any iMac that exhibits these symptoms.
Flickering display 27" 2.66 Quad i5 ATI 4850 1TB Breaksandbeats I got the new iMac 27" (dual core) about two weeks ago and have experienced the flickering screen to a lesser extent than many on here but still enough to worry.
Flickering display 27" 2.66 Quad i5 ATI 4850 1TB CarpeNoctum I got only one flickering, rebooted and never saw it again until today (12 days after purchase). I called the shop in Brussels where I bought the iMac from and they told me they know the issue, asked me to take the iMac there, they will send it to repair... Read More
Flickering display 27" 2.66 Quad i5 ATI 4850 1TB Vagus I had this exact problem- flicker, tearing, going black, as seen in the videos here the morning after I set my iMac up after waking it from sleep.. It went on all morning until I did a PRAM reset
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB jakematics 2 days in am seeing ever so slight flickering - nearly imperceptible. So far it's a minor annoyance a few times a day.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB Greywolf8577 I received my new 27" last night and it was doing the same thing. The horizontal bar, and the screen going black for a second.
Flickering display 27" 2.66 Quad i5 ATI 4850 1TB Anijake Well this just started to happen to my i5. 3 times today, flicker and the screen tear. I took pictures and plan to go to the store tonight for a replacement. Mine is less then a week old.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB gerti I only see this when I wake the system from sleep. If I restart it, I can work on it all day without a hint of a flicker.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB rushpip After 1 hour it started the flickering. Tried the restart- nothing. This morning, after 1 hour or so it started again.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB Jay92323
Flickering display 27" 2.66 Quad i5 ATI 4850 1TB thomashome
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB Ed Roppo Well, add me to the list of i7 owners seeing intermittent bands of static, and also occasional complete 'blackouts' of the entire screen. Very disappointing.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB richiekeys123 It did the screen flicker with bands at he top/bottom about 10-15 times when I first switched it on out of the box. And it blacked out for a split second twice. I assumed it was just adjusting itself initially somehow.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB homsar W8945 i7 here; had quite a bit of flickering on Sunday
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB tokuhon
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB Bricu Over the past week, I have noticed the screen flickering issues. I have contacted apple and I am still attempting to determine if there is a pattern. For the record,this mac (4 gigs of ram, 1Tb of storage) is from batch: W8945.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB cyclelogicpress W8946 i7 received Friday November 20. Flickering and occasional momentary blackouts.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB mtwhitley 27" i7 W8947 Has the same flickering and tearing.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB mightyannoyed Just got my iMac less than 6 hours ago, and i've seen a grey screen flash & horizontal flickers...im installing all the disks to see if this still happens.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB Dreadrik I received my 27" core i7 today, and didn't have any problems until it had been on for about 8 hours. The screen went mad with blackouts, flickering and the menu bar jumping to the top 1/4th of the screen.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB kiko spain
Flickering display 27" 2.66 Quad i5 ATI 4850 1TB pors Flickering, black screen and display offset started four days after delivery and happened radomly once every day.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB mbohacz I started getting intermittent black screen - like it went to sleep, but could not wake it up - then it would come back to normal and flick back to black every now and then.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB camereo The flickering started when i was downloading garage band loops. After restarting it disappeared and was gone for the day or so. then it appeared at some point again. Just the commonly reported flicker with blackouts.
Flickering display 27" 2.66 Quad i5 ATI 4850 1TB robgb Flickering and blackouts started about three hours in. I zapped PRAM and it went away for a couple days. Then it was back. Then it was gone. Then it was back again. This, over the course of a few days.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB JiminSF So far I've had one flicker/corruption followed by a blackout/blink and one blackout/blink in isolation, and have used the Mac for many hours a day for the 7 days I've been using it.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB erickhxc just got my imac i7 and after 3 hours started flickering and blacking out gonna ask for a refund, then buy it next year when this problem has solve.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB Jason Warnke Just got my i7 yesterday (W8947) - it worked like a charm all day yesterday...started using it today and I experienced my first flicker and black out. I restarted and has not recurred yet.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB Wilderness Dreams For those people still attempting to spot any pattern: 1. The machine has been on for less than 15 hours in total. 2. The longest single period it has been on for is approx. 2.5 hours 3. I have done nothing more strenuous than having iPhoto and firefox
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB Ricogasket It worked well for 2 days. 3th day, the flickering began as did the blackout of the screen for a second. Make : W8947
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB seventron
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB wty After using for half of the day, i am already experiencing the screen flickering problems a 3" bar going horizontal across the whole screen appearing every once of a while. sometimes in the middle of the screen, sometimes towards the bottom of the screen
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB KozureOokami intermittent flickering two days ago and yesterday (days 4 and 5 since I got the machine)
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB Egrava I experienced absolute no issues until today. I powered the machine up this morning to so some simple reading. While reading the Washington Post (nothing taxing for the video or system) the screen flickered three times.
Flickering display 27" 2.8 Quad i7 ATI 4850 1TB starocker Mine is W8948, now flickering
Flickering display 27" 2.66 Quad i5 ATI 4850 1TB Leisas4 blackouts
Flickering display 27" 2.8 Quad i7 ATI 4850 2TB Dhalgren My screen not only flickers intermittently, and goes black briefly (as if it's shutting off and coming back on), it sometimes splits horizontally, with the lower dock and the lower border shifted up to the middle of the display and the top of the display