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Did you know about dust problem in 27" iMac?
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I do. After 10 months of use, i got dust on the left bottom corner. I wonder if 2020 imacs got the same issue, lol
I got a 2019 iMac and after 1 year presented dust. So I guess it’s a hardware design problem with current lineup of iMac.
I don't know but I wouldn't buy another 27 inch Mac, New or Used. It looks like Apple doesn't care about this problem since it's gone on so long. (Knock on wood) My blackish smudge marks have not come back since the screen has been replace at the Apple Store.
So you think it might be a faulty screen assembly? It's just weird i had 2017 5k iMac, used it over 14 months and it was just fine, maybe i was cleaning my table with a wet rag more often back in 3 years, might be related...
I believe it way be something to do with airflow getting into the LCD panel assembly and depositing dust. Air comes in the bottom of the iMac and out through the top. My old 2007 24” iMac which has a removable glass developed a large gray mark on the lefthand side. It was smaller at the bottom curving and getting larger towards the top. It was more visible when the screen was off. I thought it was inside the lcd. When i took the machine apart to install an SSD in noticed that it was on the back of the glass. It would not brush off and it looked baked on. It took a serious bit of cleaning to get it off. Now the screen looks like new.
So back to the new iMacs which don’t have removable glass. It may be possible that some kind of airflow is getting into the LCD sandwich causing this issue.
I also had a high end 4k 55” tv that developed a similar issue after 3.5 years use and was deemed unrepairable. The retailer gave me a replacement set (different model).
I now have a 2019 iMac so will keep a lookout for this. I have not had any issue on my 2011 iMac which also has a removable screen.
So back to the new iMacs which don’t have removable glass. It may be possible that some kind of airflow is getting into the LCD sandwich causing this issue.
I also had a high end 4k 55” tv that developed a similar issue after 3.5 years use and was deemed unrepairable. The retailer gave me a replacement set (different model).
I now have a 2019 iMac so will keep a lookout for this. I have not had any issue on my 2011 iMac which also has a removable screen.
Hope you're cleaning the dust on your table at least once a week. Sadly we don't have an apple store in our country, but in the US, they usually just replace the whole screen when you're under applecare?
Could be when it was originally assembled. Could be when assembled there was not much care doing it. After the Apple Store replaced my screen I have no problems now.
Let's hope for a factory assembly defect. I just got my 2020 iMac recently, hope i won't get this issue, like on a 2019.
Think it is just luck! Probably plenty of all laminated screen iMacs of all years have no problems.
I had a 2015 27” iMac 5K that developed this issue within warranty and the screen was replaced. Within 8 months the dust started to re-appear, and I sold it while it was barely noticeable. It was just when iMac Pro came out, and I needed a new Mac. I went with Mac Pro 2013 because of my bitter experience with iMac.
Sorry to see that there are iMac Pros with this issue, which is unacceptable.
Aside from the fact that it will probably come back it's also incredibly cost prohibitive.
Since they basically change the whole display the cost was close to a 1000 euros. Approx 1200 dollars...
I personally didn't go through with the repair.
I'm still under apple care so apple said they would replace the display for free. There must be either a common problem with the display part, or the design of the iMac chassis or cooling system. I would really love to know what is the root cause of the issue.
My computer's are in a dust-free studio, but is there anything in particular I should do going forward to help prevent this issue? Should I run a Hoover nossle along the bottom and/or rear vents periodically?
I expect this issue to reappear in future, by then I will be out of warranty and will not be paying for a repair, so I'll have to live with apple's design flaw.
It just seems so weird that this issue is well documented across many models of iMac over the years, but the root cause does not seem clear.
My computer's are in a dust-free studio, but is there anything in particular I should do going forward to help prevent this issue? Should I run a Hoover nossle along the bottom and/or rear vents periodically?
I expect this issue to reappear in future, by then I will be out of warranty and will not be paying for a repair, so I'll have to live with apple's design flaw.
It just seems so weird that this issue is well documented across many models of iMac over the years, but the root cause does not seem clear.
I always use a pillow cover after shutting down my iMac and run the vacuum cleaner once a month on the BOTTOM vents ONLY. Besides, I use a damp cloth almost every other time I power up the machine to keep my desk as free of dust as possible.
I applied this "recipe" ever since I received my 2020 iMac last September and I am yet to see any clouding or unwanted spots on my screen. There is only some super slight vignetting effect in the lower corners of the screen, but I noticed this ever since I received the iMac and it didn't get worse nor it disappeared. It doesn't bother me at all as the vignetting is incredibly faint and one needs a bright background to be able to see it.
Attaching some pics to show how my iMac looks like with the pillow cover. Note that I am taking advantage of the hole at the back to position the cover in such a way that the lower vents are completely covered.
I applied this "recipe" ever since I received my 2020 iMac last September and I am yet to see any clouding or unwanted spots on my screen. There is only some super slight vignetting effect in the lower corners of the screen, but I noticed this ever since I received the iMac and it didn't get worse nor it disappeared. It doesn't bother me at all as the vignetting is incredibly faint and one needs a bright background to be able to see it.
Attaching some pics to show how my iMac looks like with the pillow cover. Note that I am taking advantage of the hole at the back to position the cover in such a way that the lower vents are completely covered.
Attachments
That is terribly ugly.
There are premade products with the same function. Or you can just ask you friend who can sew to make one for you.
Yep, I know it's super ugly, but the pillow cover does the job and it was... free
. I've seen a slick iMac cover for like $30 here in Romania, but I'm not sure if it's worth it. Might consider it down the road, though. Thank goodness I don't have his number ??.Yeah, please don't show that to Jony Ive
Effective, though