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Old Dec 21, 2009, 03:12 PM   #1
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Apple Releases Firmware Update to Address Screen Flickering on 27-Inch iMacs



Apple today released 27-inch iMac Graphics Firmware Update 1.0, addressing recent complaints of screen flickering on the company's newest iMac models.
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About 27-inch iMac Graphics Firmware Update 1.0
Updates the graphics firmware on ATI Radeon HD 4670 and 4850 graphics cards to address issues that may cause image corruption or display flickering.
Installation instructions for the firmware update, which weighs in at 683 KB and requires Mac OS X 10.6.2, are available in the associated support document for the release.

Apple's new 27-inch iMac models have been plagued with reports of issues since their launch beginning in late October. Early reports of Flash performance issues were fixed with the release of Mac OS X 10.6.2, but more recent reports have revealed machines being delivered in a non-functional state or with cracked screens.

Article Link: Apple Releases Firmware Update to Address Screen Flickering on 27-Inch iMacs
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Old Dec 21, 2009, 03:16 PM   #2
dfunct
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I first noticed the flickering this morning when I woke, a quick reboot later and it seems to have disappeared…

That said this update is welcome, if only it could also remove the speck of dust under the glass...
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Old Dec 21, 2009, 03:18 PM   #3
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If only the flickering happened behind an anti-glare screen. . . .
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Old Dec 21, 2009, 03:20 PM   #4
spencers
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Can't wait to try this.

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Originally Posted by dfunct View Post
I first noticed the flickering this morning when I woke, a quick reboot later and it seems to have disappeared…

That said this update is welcome, if only it could also remove the speck of dust under the glass...
So take the glass off and use some canned air!
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Old Dec 21, 2009, 03:21 PM   #5
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lol good timing, Only returned my previous screen flickering iMac back 2 months ago
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Old Dec 21, 2009, 03:21 PM   #6
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This is the best news I've heard all day. I'm so glad I didn't return my new i7 iMac.
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Old Dec 21, 2009, 03:23 PM   #7
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Quote:
Originally Posted by spencers View Post
Can't wait to try this.



So take the glass off and use some canned air!
This will usually result in more dust under there when you put it back, unless you do it in a closed environnement that is completely dustless, such as a government secret research laboratory under the Nevada desert.

I very much doubt anyone has access to those except few key government employees.
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Old Dec 21, 2009, 03:23 PM   #8
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"image corruption", would that be the yellow tint?
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Old Dec 21, 2009, 03:25 PM   #9
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If only they could release a Firmware Update to fix the yellow tinge...
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Old Dec 21, 2009, 03:35 PM   #10
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Quote:
Originally Posted by slicecom View Post
If only they could release a Firmware Update to fix the yellow tinge...
Tell me about it. I just arranged for iMac #3 to be delivered to me yesterday. All because of the yellow tint at the bottom of the screen. Ugh.
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Old Dec 21, 2009, 03:37 PM   #11
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now fix the flickering + snow/noise + screen scrambling with your 30-inch display via the $99 mini-displayport to dual-link dvi adapter!
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Old Dec 21, 2009, 03:37 PM   #12
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What if computer no longer as OSX installed ?

Here's an interesting question...

I have a buddy that bought a 27" imac and wiped it clean and installed Windows 7 on it. I'm guessing that firmware updates will only come through for OSX users...

So... what is the best solution? Maybe set up an external USB drive with OSX installed on it and just boot to that drive occasionally to get the firmware updates?

-Brian

Last edited by brianadkins; Dec 21, 2009 at 03:57 PM. Reason: poor spllelling
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Old Dec 21, 2009, 03:38 PM   #13
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Since we're chatting about the issue again: Had anyone else had sound issues on the 27" imac? If nothing else is playing, the speakers can emit a low electronics like noise. If you put headphones on, you can hear the frequency of the sound change a bit when you (say) scroll in a browser window. Maybe graphics card interference?

Just curious if anyone else has 'heard' this, and if it will go away when I update firmware tonight....
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Old Dec 21, 2009, 03:39 PM   #14
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Originally Posted by KnightWRX View Post
This will usually result in more dust under there when you put it back, unless you do it in a closed environnement that is completely dustless, such as a government secret research laboratory under the Nevada desert.

I very much doubt anyone has access to those except few key government employees.
Well, considering that the Genius Rooms in Apple Stores (where they do iMac glass removals daily) aren't closed, completely dustless environments, I think the average person has a decent chance of being able to do it well themselves.
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Old Dec 21, 2009, 03:39 PM   #15
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Quote:
Originally Posted by brianadkins View Post
So... what is the best solution? Maybe set up an external USB drive with OSX installed on it and just boot to that drive occasionally to get the firmware updates?
yup! but use a firewire drive.
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Old Dec 21, 2009, 03:43 PM   #16
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Quote:
Originally Posted by brianadkins View Post
Here's an interesting question...

I have a buddy that bought a 27" imac and wiped it clean and installed Windows 7 on it . I'm guessing that firmware updates will only come through for OSX users...

So... what is the best solution? Maybe set up an external USB drive with OSX installed on it and just boot to that drive occasionally to get the firmware updates?

-Brian
A USB hard drive will work just fine for the occasional hop back to OS X.
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Old Dec 21, 2009, 03:44 PM   #17
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Maybe they'll put out a firmware update for cracked screens next.
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Old Dec 21, 2009, 03:48 PM   #18
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Quote:
Originally Posted by aristobrat View Post
Well, considering that the Genius Rooms in Apple Stores (where they do iMac glass removals daily) aren't closed, completely dustless environments, I think the average person has a decent chance of being able to do it well themselves.
Ok so how the chuff does one remove the glass to do this?
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Old Dec 21, 2009, 03:49 PM   #19
dmackerman
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I downloaded and applied this update even though I didn't have any issues with flickering or blackouts.

I wonder exactly what it changed...would be interesting to know.
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Old Dec 21, 2009, 03:49 PM   #20
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does the 21.5" ATI 4670 Version do not needs this?

I tried the software update, nothing showing up?
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Old Dec 21, 2009, 03:50 PM   #21
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Quote:
Originally Posted by shanmugam View Post
does the 21.5" ATI 4670 Version do not needs this?

I tried the software update, nothing showing up?
It says 27" iMac.
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Old Dec 21, 2009, 03:52 PM   #22
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i can unfortunately confirm this update does not fix the less common blank screen on wake-up issue. finally time to return my 27" C2D : [
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Old Dec 21, 2009, 03:54 PM   #23
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So..... has anyone had any results yet? I'm curious as to how thy fixed it. Maybe lowing the memory / gpu speed? I doubt it was a "bug" in the firmware / Driver as not all are affected.
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Old Dec 21, 2009, 03:54 PM   #24
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Quote:
Originally Posted by dfunct View Post
Ok so how the chuff does one remove the glass to do this?
Here's how: http://tinyurl.com/y8rgsq8
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Old Dec 21, 2009, 03:56 PM   #25
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Quote:
Originally Posted by dfunct View Post
Ok so how the chuff does one remove the glass to do this?
If I recall correctly, it's held in place by very strong magnets. You use two suction cups to pull it off.
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