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Hello, I love your guides.
I'm about to swap the HDD for SDD.
Since a display is off, I wonder if it is easy to clean the bottom edges of the display. They look sort of black smudges, likely caused by dust.
I wonder if you could share with your guide on this issue or just point at the right one if already online.
Thanks!
My best,
Andy
Is this a good question?
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Sadly the 2012 model has a sealed display so you can't open it. All you can do is clean the external part. What you are likely seeing is screen burn-in.
I should warn you make sure you use the correct tools and techniques as outlined in the guides. You can easily damage the display assembly if you're not careful which would be a big Oops!
Here's the IFIXIT guide you'll need to follow: iMac Intel 27" EMC 2546 Hard Drive Replacement.
Don't forget you'll need the OWC replacement thermal sensor and an adapter frame to hold your 2.5" SSD into the frame where your old 3.5" HD was. Here's what you'll need:
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Hello Dan, thanks for your guideline. The ifixit guide does not say anything about the sensor? Is it because of HDD->SSD swap? If I stay with another HDD, would that avoid the sensor? I am in Europe so I do not think I want to deal with that US-based order. It is gonna cost a lot to ship (if possible, at all) and custom, in addition to the piece price.
my best,
Andy
Yes you need the sensor! Apple HD's are custom and have a special internal sensor for the systems heat management system (SMC) to know how hot the HD is. Sadly, if its not present the system will go into fail safe mode pushing the fan into high. So any 3rd party drive will require the sensor (HDD or SSD).
As it turns out OWC does have a Europe storefront and there are a few brick & mortar as well as other online stores in Europe that sell it.
I'm sure we have a note about it in the guides, if this one is missing it I'll make sure its put in.
Most people add a blade SSD which is mounted on the other side of the logic board: iMac Intel 27" EMC 2546 Blade SSD Replacement. Its a lot more work.
are there any drives (either HDD or SSD) that I can buy and have that sensor built in?
Andy
Sorry Apple contracted the HD vendors to build a custom drive for them. So unless you use Apple's spare part (HD only here) you're stuck into using the adapter (Apple charges quite a lot for their parts). I never use them, You get more for less with one of the 3rd party suppliers. Think of it this way Apple is stuck with what the system was designed with day one so as time marches on... They can't offer anything newer which is better (faster and runs cooler)
This is not a bad thing! I've put in a good 20 or so iMac's I have not had a problem with any of them.
Did you review the guide?? Did you not want to remove the HDD and put in place a SSD?? If that is the case then the guide and the parts sans the drive its self is as I have stated.
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6 Comments
Andy "They look sort of black smudges, likely caused by dust." Post some images of those. That would enable us to see what you see. Use this guide Adding images to an existing question for that.
I am not sure what constitutes a sealed display but there are plenty of screws around the frame.....Can you check to see what model your panel is? Could be a LM270WQ1 SDF1
by oldturkey03
Hello, yes the display is exactly what you pointed at and the image is attached to the post.
thanks
by Andy
Thats screen burn in!
Your desktop image did this. The screens of the 2011 & 2012 models where more sensitive (Apple had a recall on them - long since over).
Switch your background to a plain blue with very little desktop clutter and leave the system running. Overtime it will fade.
Otherwise you'll need to replace the screen.
by Dan
@oldturkey03 - Sorry the 2012 model is the first model of the 'Thin Series' from this model onwards Apple glued the cover glass to the LCD. There is no real way to pull off the cover glass without damaging the LCD.
by Dan
Andy those do not look like burn-in. Those look like pressure marks on the diffuser sheets.
by oldturkey03
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