Intel Mac :: Why Is New Refurbished 21.5 Inch Screen Flickering Every 10 Seconds
Apr 9, 2012
I just received my 21.5 inch imac refurbished. It is the 2011 model. I really like it, but the screen seems to constantly be adjusting brightness...Almost as if it is "flickering every 5-10 seconds. It is extremely annoying, and I think I will have to return it to apple. So another two weeks of waiting for a computer.
Info:
iMac, iOS 5.1
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Feb 11, 2012
My iMac is one of the late 2009 models (bought Jan2010). My screen has started to flicker over the past couple of days. I have the correct screen firmware.
Info:
iMac, Mac OS X (10.6.8)
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Nov 16, 2009
Supposedly this was fixed with 10.6.2
Anyone else still experiencing this?
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Jul 29, 2010
Hello everyone, I'm currently looking to buy a 27 inch imac and can't decide whether to get a base i3 27 inch or a refurbished i5 quad core 27 inch. With the i3 I can get the student discount and qualify for the ipod, but the i5 is 23% off right now. Which should I get? Also is there a benefit of getting a 5 series graphics card over a 4 series graphics card?
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Apr 11, 2012
My screen is continuously flickering ranging from quick lines flashing across various parts of the screen to the entire screen going black for a fraction of a second. This is now happening with more and more frequency. However, I do have a second monitor connected and the flickering is not happening on this screen (A Dell Screen). Is there a certain fix or should I contact Apple Care?
Info:
iMac, Mac OS X (10.6.8)
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Apr 25, 2012
why is the screen flickering and then going black
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Jun 24, 2012
I've just switched my imac 27 inch on this evening and it is continuely flickering really bad.
The machine isn't even a year old yet, so not really happy about it.
I have the apple care protection plan, so suppose if there is something wrong with it hardware wise, then this can be fixed.
Info:
iMac
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May 23, 2012
I have an iMac 27". The left half of my screen started flickering, and now it is quite darker than the right side (facing my computer). Do I have to bring it in to the store or is there a fix?
Info:
iMac
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May 21, 2012
I tried starting my iMac and all I get is a light colored screen and a beeping sound about every 5 seconds. No sound from the drives. How can I get it to turn on?
Info:
iMac, Mac OS X (10.6.3)
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Mar 17, 2012
problem of getting black screen on imac running 10.6.8?
Info:
iMac (27-inch Mid 2010), Mac OS X (10.6.8)
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May 11, 2012
my imac is about 3months out of the box and a few days ago i went to turn it on and....nothing. i could hear the start-up chime and the mac clicking and making "doing" noises, also i could clearly hear the volume toggle up and down. That said, the screen remained, well, dead and just black.So, the first thing on my agenda for the weekend was to take my imac into the shop. As i was organising the equipment, i tried one more time to turn it on.It worked.For me, that's a bad thing as my mac may do this again. It was out of action for 3 days now it's back. So now i am on here.
Info:
iMac
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Jun 4, 2014
I have a 27 inch desktop. Upon turning the computer on within seconds the fan comes on. Then it goes to a high fan. Then it goes to a black screen. Then it shuts off. Then if you click the mouse it will come back on. This cycle repeats itself every 5 seconds. Only one time in the past month did it turn on normally and run for me.
Info:
iMac
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Jun 2, 2014
I have a 27" iMac. Just recently, the screen has begun to randomly shut off. I then have to squeeze the power button, followed by a click of the mouse. This will bring me back to my password screen. Sometimes, that would be it, other times, it will do it repeatedly, for no reason, and then settle down.
Just for those of you who are bound to ask me about my Energy saving settings: Computer to sleep – Never. Display to sleep – 15 min.
It seems to me that this could be a hardware issue, but just incase any of you have had any experience of something similar, I thought I would ask.
Info:
iMac, OS X Mavericks (10.9.3), 27: iMac 2.7GHz Core i5
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Feb 3, 2012
Desktop restart shows flickering black/white screen, then black. Could not restart.
Info:
iPad 2, Mac OS X (10.6.6)
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Jun 15, 2009
Has anyone noticed a very slight flicker on their new MBPs? I have a new 13" and, every so often, the screen brightness dims and then brightens very quickly (happens in less than a second).The option for auto-adjusting the screen brightness is off so it's not that particular function.It's most noticeable on all-white backgrounds both on AC and battery power. Hard drive access doesn't seem to coincide with the dimming.
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Dec 5, 2007
Thing is I got hold of a 1ghz 17" iMac almost for free, it had a dead logicboard (I checked it with a voltage-meter), but I figured I could fix it and have a small hobby project-thingie going on. Well I just got a new logic board today, for a 1ghz 17" iMac g4.
Things is I only get a bright grey screen from my Mac when I boot. I've tried connecting it to a external display and that works fine. Everything is there.
I then reinstalled Tiger on it, with the computer connected to my external screen. And I still have the same problem. (I have now disconnected the ext. screen and is controlling the iMac from my MBP). So at least it isn't the installation.
So what is the problem? I can via an Apple Keyboard control the brightness on the blank screen, which would indicate that it does react to input of some degree.
I've read that if the inverter is dead or anything else is dead, you would get a rolling grey screen, flicker or something like that and not a steady bright grey. One thing I'm thinking is. What if somehow this logic board was for a 15" 1ghz imac g4? Can I check this?
I read that long thread about guys buying hi-res displays for their MBPs, and they had to replace some display profile? Could I maybe fix it with a different display profile-file?
I'm really confused by all this, and would appreciate any help I can get.
Model: PowerMac6,1
CPU-Type: PowerPC G4 (3.3)
and
the gfx chip is a GeforceMX4 with 32mb.
The display is a mode 9c27, manufacturer 610, serialnumber 00000, manufacture date: B84D7200.
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Nov 5, 2010
I've had the new macbook air just two days now. Turned it on this morning, used it for like 5 minutes and the screen just started flickering, and the whole machine just froze on me! Had to do a system reset, but I'm a little concerned after spending over a grand on this macbook! Has anyone else experienced this? I'm actually thinking about returning the machine..
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Jun 1, 2008
So I have noticed a few times already, that the screen on my white macbook flickers to change the brightness level. It can do this while the computer is plugged in and charging, or if it's off the charger. It is definitely noticeable as it causes me to just watch what the screen is doing.
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Jan 28, 2010
My screen just started to occasionally have a flicker of a white line show up...It doesn't happen that often, should i worry? Is it worth taking it into apple? (Under warranty still) Since its not consistent i wont necessarily be able to show them what its doing..
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Jun 11, 2012
I am considering buying a refurbished imac from Apple. Can a store demo be sold as a refurbished?Is there a way to find out before purchasing it? I personally would not want to buy a demo.
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Apr 15, 2012
hey i have just bought a refurbished apple imac and i was looking for the i'life11 pacake that should come with this mac it contains iphoto, imovie and garageband, but i can not find it anywhere on the system i have done a system software update but still no sign of it. the ilife software is however registerd to this computer :
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Dec 7, 2008
First I wasn't quite sure about the issue, but sometimes I thought my MBA display was flickering. Then I found this thread
[URL]
Does your screen flicker too, when you watch this pattern ?
[URL]
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Apr 7, 2009
My white Macbook, the one i'm currently typing on; the screen keeps flickering. 've uploaded a video taken from my cell phone of the screen flickering. I love my white macbook but the screen keeps flickering until I keep adjusting the angle of the screen. Some days the screen flickering is minimal and I'll adjust the screen easily with minimal screen flickering. Other days i'll be adjusting for a few minutes until I can get it at an angle where the screen doesn't flicker.Here is the link of the screen flickering: [URL]I've noticed there is less/to no flickering at all the closer I adjust the screen downward, i.e., the closer it is towards the macbook itself being closed.
As for the Macbook itself, it was purchased in December 2006 and have had AppleCare since. In June of 2007 I took it in to Apple since I noticed the screen flickering very minimally only when the screensaver came on. I was then told a small soda spill was on the logic board and AppleCare would not cover it, though I was still covered regarding all cosmetic repairs, aside from that soda spill. It hasn't been till the past 2 months the screen flickers heavily and I'm just sitting at my desk adjusting the screen until there is no flickering so I can get my work started. I was considering selling my Macbook for anyone that wouldn't mind the screen flickering but i've upgraded this Macbook with a 500 GB hard drive and before attempting to sell it i'd rather fix the problem myself.
Everyone, I'm all ears. I'd love to fix this problem. If it means completely voiding my AppleCare warranty and opening up my Macbook, so be it. the warranty expires in 6 months anyway.
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Apr 5, 2010
I did a quick search of the forums, and so I know there are previous threads about this. But my screen is flickering a lot lately and so I plan on either sending it to Apple, Driving 3 hours to Dallas since it's the closest Apple store, or taking it to an authorized repair place here in town. I just have a few questions for anyone that has either had this problem before or maybe just has dealt with repair issues before.1. Should I wipe my Hdd?2. Which of the three options would be the better bet?3. Anyone know if they would just fix it or if they would replace it?
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Sep 12, 2010
Apologies if this has been posted before, but rather than trawling through the thousands of threads, and before hitting the Genius Bar.... thought I would run this by the experienced MBP owners first.Got my first MBP (crossed over from PC back in April), and within the last couple of weeks, noticed that the screen is flickering intermittently.
Wondered if it's a glitch stemming from the switch from Graphics card as/when needed, or if it's an indication of something more serious and warrants taking it in to the Genius Bar... (don't want to part with it for days unnecessarily).
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Nov 13, 2010
I went on a website only to noticed the black lines & columns on the page, especially at the bottom, gives off a noticeable flicker on my 13'' MBA.
Obviously with the issues of MBA screens, I'd like to check with you if the same thing occurs on yours? I'm finding it very worrisome that my screen could be faulty.
Click here: http://news.bbc.co.uk/sport1/hi/moto...ne/default.stm
Leave it for a 10 secs and the black lines flicker quite noticeably on mine ( I have click to flash installed & you tube 5 extensions.
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Dec 8, 2010
I have a Macbook Air that is about 2 years old. Recently, the backlight started to go off randomly, it always lasts for less than a second and then is back to normal.
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Jun 7, 2006
OK so i just noticed TODAY that my powerbook's screen is flickering. i didnt really notice it until i changed the background to a neutral grey and now i see a horizontal flicker. does it always do that? or is something going bad?i still have a year left on my apple care ( fortunately ) so if its dying ill certainly take it in to them.
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Mar 15, 2007
...as the color green becomes dominant. The background on the browser is a faded greenish color, and the desktop image is degraded. Got some dandy streaks too! Searches say maybe logic board, but the guy I bought it from said it had a new logic board installed. Cables was a thought, but rotating iBook does not effect changes. I've shut it down for the moment, but am anxious to pinpoint the problem?
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Jan 2, 2009
I have a problem with my 4 year old iBook G4 screen, which flickers or blacks out depending on how far open the lid is. The problem has worsened over 6 weeks. What is the diagnosis?
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