Screen Flickering on 27" iMac Core i5, anyone solve this yet?

See the later pages in THIS post.

Well this data sort of helps. Sort of makes me cry. Flickering started today on my i5 imac two weeks out of the box.

http://imac.squeaked.com/results.php?func=b&id=flickering

I'm tempted to get the 21.5" screen instead based on this data

I am fresh back from the apple store with a new 27" i5 imac replacing the one I purchased two weeks ago. When you go back to your Apple store you will want an imac that was made weeks 49 or 50 (see New Zealand PC World article about the flickering problem). The third and fourth number of your serial number (also on the box sticker) is the week it was manufactured.

Differences I see: My week 46 flicker imac ran at a much higher temperature (52 degrees celsius) according to a downloaded application called Temperature Monitor. My week 49 imac is now running at 33-35 degrees). Fan is blowing harder most definetly.

Hope this helps. Good luck.

I have a friend who has a week 50 27 i5 and after a few days started having flicker problems.

I have a week 49 and have had thankfully no flickering or yellowing and was bought 11/27. I am hoping it stays this way..

See http://www.computerworld.com/s/article/9142199/Graphicsissues_force_Apple_to_delay_iMac_orders_resellersreport

and click on read entire article

Mine is an i7 made in week 46. No flicker.

zoz

Mine is week 49 and with flicker. Sometimes really bad where the screen turns totally off or split-screens on me.

My first 27 inch Quad core i5 iMac came in early November, it was produced on week 45..Flickering and black outs were noticed one or two days after getting it. After 5 calls and a trip to a Apple authorized tech. who could not reproduce the problem..Finally Apple sent me a replacement computer made on week 50 and I have the same issues with the flickering and blackouts on that new imac as well! Not sure what to do? I called apple again and they said they are working on this issue and keep checking back with them and let them know if the problem gets worse. Will there be a software update to fix this issue or a batch recall? It sure would be nice if Apple could contact all of the other thousands of people who are experiencing the same problem with a update or solution. I really don't feel sending another computer back waiting another 2 weeks for a replacement to see the same problem again! If anyone knows a fix to the screen problems with the new 27 inch iMacs please comment.

Brian Vaughn wrote:
If anyone knows a fix to the screen problems with the new 27 inch iMacs please comment.

Brian ~ Welcome to the discussions. See this Apple doc posted Dec 21:

_27-inch iMac Graphics Firmware Update 1.0_

This doesn't fix the flicker!

Hi,

for some it seem to work, so it is worth a try.

volker

Got iMac Nov. 24. Do not recall much flickering or other problems until after the firmware update. Now the problems have become very noticeable. I had the problem where the bottom of screen moves to the top, but before I rebooted I was reading these threads and the screen fixed itself. It still is flickering!!!

I'm having all these same flickering problems. I'm on to my second replacement. And after waiting a couple of weeks for the new machine. It has exactly the same problems as the previous!! I've installed the firmware update and now just waiting to see if it works. Not sure I should trust it though. Almost ready to give up and just return the Mac.