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[GUIDE] Fix iMac flickering and dark screen problems out of warranty

If you have a Late 2009 27" iMac and are having problems with those annoying problems of flickering and parts of your screen are becoming darker (On the left side primary) you may want to consider this easy guide to fix it if you run out of warranty, have no Apple Care and Apple wanted to charge you about $600 to replace your screen. You need no tools and the cost os this procedure is 0.



First Step: Be sure that you are experiencing the same symptoms



This guide is only to resolve flickering and dimming problems on you iMac screen. Primary occurring on the left side (becoming darker or with less brightness than the other side) and on Late 2009 27" iMacs but there are cases of the same problem on later computers too.



Check/Read all of these posts to know if your case is the same:





Thanks to the findings of nicholasfromconfolens we know that the problem resides in some parts of the screen getting loose for any reason (factory problem, heat, whatever) and if you apply pressure at certain point the flickering/dimming/darking disappears. The problem is that you need to maintain that pressure all the time.



Second Step: Find the correct spot to apply pressure



Without removing the glass panel of the iMac, try to press it strong enough (but don't use excessive force or you could break it) near the bottom left part to see if the dark/flickering disappears at some point. If it does, you are lucky, your problem has easy solution and you can proceed to the next step. If not, don't despair, your glass panel may be very strong and you will need to remove it to apply pressure. Head to the next step.



Third Step: Removing the glass panel



It is recommended to use suction cups to make this task more easily but it's not mandatory, you can remove the glass with your hands. The glass panel uses magnets to get in place all around and has some flaps on the bottom part. To remove it you need to hold it from the upper right and left corners and make force towards you, once it get loose just elevate it to remove the bottom flaps from its holes. You can follow these links with guides that clarifies this a bit more:






Fourth Step: Pinpoint the correct spot to press and place something to maintain the pressure



Once the glass panel has been removed, you must find where is the best point to apply pressure to get rid of the dimming/darking/flickering. The most common point is the left side between the rubber band of the screen and the grey band below. (See the photos for better understanding).



Once you find the best spot, you need to place there something to increase the thickness in that point and to maintain pressure when the glass panel is mounted again. I suggest you to use a pair of adhesive strips/pads mounted one over the other made of rubber or textile material that are used to put under furniture (chairs, tables) to prevent them to scratch the floor (I don't know the exact name in English, sorry).



Fifth Step: Mount the glass panel again



Mount the glass panel again and see if the pressure is enough to prevent the problem appearing again. If not, you should dismount the glass panel again and add more thickness to the "critical" spot adding more pads, but beware, add them gradually or the pressure may be excessive and break the glass when you remount it.



Final Step:



Enjoy your "new" screen and the saving of nearly $600 on repair costs.



Here below you can fin some photos and a video of my "set-up" to fix the problem.



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iMac 27" (Late 2009) Flickering And Dark Screen Fix (VIDEO)




I hope this guide helps you. Feel free to contact me if you have any questions.

iMac, Mac OS X (10.6.4), No tools required

Posted on Jun 19, 2012 8:37 AM

Reply
186 replies

Jan 9, 2013 6:56 AM in response to EmmaKBentley

Those are fantastic images Emma, thanks for that.


Again it shows how ASTOUNDINGLY SIMPLE the problem is ........ A LOOSE MICROPLUG.


It's just that simple - a loose microplug.


It's difficult to fix unless you're a professinal electrician - but a professional can fix it in literally like "2 minutes"


1. remove screen.


2. remove 1x piece of silver sticky tape.


3, fix loose plug.


I hope you saw my video .. http://www.youtube.com/watch?v=4QJ4rqvn2G8 ..


which shows perfectly clearly it is nothing other than a loose plug, behind that "silver paper" ... my ten year old made that video, for goodness sake.


It is totally astounding that Apple won't just fix this problem.


The moment any skilled person -- like our Kaos - opens the machine and pulls off the silver sticky tape, any experienced person instantly realises ..


"Oh, it's a loose plug"


To repeat - it si simply utterly amazing Apple don't just fix it, for the PR value.


It is an unbelievable black mark on Apple's reputation.


It is CLEARLY a consistent problem that is affecting 1000s of people with the LG screens, and it is CLEARLY nothing more than a loose microplug!!!!!!!!!!!


You know Apple are reading this .. every time someone watches this video http://www.youtube.com/watch?v=4QJ4rqvn2G8 they are more and more embarrased!


Let's consider this -- Apple knows, absolutely undeniably -- that it is an incredibly simple fix.


And they know, absolutely undeniably -- that it is a known consistent problem with these LG units.


That's a bad conbination.


Thanks Emma

Jan 16, 2013 5:32 PM in response to Kaos2K

Well although this issue is a known problem I was unwilling to make the attempt given the cost of fixing the issue. I have read posts from 2009 to present postings showing Apple knowingly has been denying the issue based on the failure happening outside warranty. I just dropped the Mac off at the store with the sticker shock of the $600 price tag. Pushing on the screen didn't work from the outside case. Why wouldn't apple just go back to Samsung and say anti up and just make good on a defective product. When has it been ok to pay for something more than once by shortening the warranty. Where the heck has pride and quality gone. I converted to Mac from windows and still do not regret the change but I never had a monitor go out in 11 years.


Make it right should be the battle cry not pay up. Lastly if I hear you should of bought extended warranty from another apple person I will just walk out. If we are going to sell additional coverage than make the warranty longer and cover those hard to get parts later. When systems are in production the price of the units are low given volume. Later those parts cost more to get because of lower volumes. So pay now for availability later. No part should cost more than 10% of the purchase cost.

Feb 5, 2013 10:07 AM in response to Kaos2K

Kaos2k,


short version, fixed without soldering - just bending those teeth on that white connector.


1st off, thank you very much to share this DIY fix. my 18 months old imac had this issue 3 weeks ago. i went to 2 different local apple store ( pleasanton, CA and santa clara, CA) just to show them a photo of the problem, they told me the check is free but they think it will cost me at least $600 to fix this. and then i found this post, after reading and reading i finally got the ballz to open it. i tried John-Paul May technique by pressing it gently with finger but it was still flickering. i pulled the white connector out (had to do some cutting on those white plastic to move it out). its really a small area for me to work with if i need to cut those black wire open and solder it down. so i tried to bend those little teeth from the white connector to point down, hoping it will get a better touch, i plugged it back in with some foam double-sided tape, put everything back together, AND IT WORKED !!!.


Thank you again to Kaos2k and John-Paul May.

Feb 9, 2013 10:30 AM in response to Kaos2K

Thanks to all the contributors here.

I had the exact same problem, left side of screen dimming, not to mention grey smudges now appearing in the top right of the screen.

I couldn't bring myself to go the soldering route but packed self adhesive pads over the socket and it worked - so far. It does seem to be a half arsed fix, but it works.

There is no doubt that Apple should issue a recall for these displays.

Anyway, my display is bright all over and I didn't have to buy a new one.

Now, if I could just resolve the erratic magic mouse problems...

[GUIDE] Fix iMac flickering and dark screen problems out of warranty

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