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meady100

macrumors regular
Original poster
Oct 9, 2011
146
398
Got bad blocks showing on my internal HDD, sadly. Not the boot drive, but the optional 1TB extra internal that was part of the original BTO. I'm skilled enough to be able to change screens and batteries on iPhones - is it the same kind of level of difficulty anyone? Thanks!
 
I'm no expert, but I was able to change the hard disk on a pre-2012 iMac with no real issues, I just watched a couple of youtube videos, made sure I had plenty of space and took it slow. Slightly easier than the modern designs as the screen is not taped to the chassis
 
Have you tried erasing the drive with the bad blocks?
To see if that corrects at least some of the problems?
 
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If you're skilled enough to change the screens etc. on iphones, the imac will be a relative breeze. Watch the ifixit video to replace the hard drive on your model of imac, and you'll be fine. Good luck :)
 
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I replaced the internal 2tb HDD from my late 2015 iMac, which has the screen glued to the chassis. Since you have a model without glue (good), all you need is the fitting screwdriver, a SATAII (or even v.III) SDD and like 30min Of your time. You should be able to do this by yourself. Enjoy!
 
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Did my first one yesterday (iMac late 2012).

Piss easy; just get correct tools after watching a few youtube vids and take your time.

Good luck!
 
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Thanks all! Excellent feedback! Does anyone happen to know if any of the videos show the location of the secondary HD? It is not my boot drive causing the problem, you see.
 
If you can do that on iPhones, then yes, you can do the imac. Just be sure to have a good guide on the side, as there are little less than 20 connectors that needs to be moved around, and as many small screws.
Tip 1: Remove the glass using your finger nails, as it is easier than using sucktion cups.
Tip 2: After unscrewing the screen, be careful with the first connector, as the wire isn't very long, so only tilt the screen ~20°.
Tip 3: Getting the motherboard back into place takes a bit of wiggling, and the right angle. Be sure to remove memory before you start.
 
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If it's a 27 inch 2011 iMac there's only two places for a drive. The HDD sits in the upper middle area above the logic board and the SSD sits behind the optical disk drive.
 
I replaced the hard drive in my pop's 2011, and it was pretty easy overall. I would say the suction cups make things a lot easier personally, and I'd advise you to have a clean place to put the glass down so you don't end up with trapped dust. Another person helping you with handing you tools and stuff makes a difference as well.

In the end I ended up losing one of the screws in the bottom, but couldn't be arsed to disassemble it again to get at it. If you don't have a magnetic screwdriver, the business will be a lot harder.
 
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If you can do that on iPhones, then yes, you can do the imac. Just be sure to have a good guide on the side, as there are little less than 20 connectors that needs to be moved around, and twice that number of screws.
Tip 1: Remove the glass using your finger nails, as it is easier than using sucktion cups.
Tip 2: After unscrewing the screen, be careful with the first connector, as the wire isn't very long, so only tilt the screen ~20°.
Tip 3: Getting the motherboard back into place takes a bit of strength, and the right angle.
Thank you for these excellent pointers!
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Meady100 never fear. I'm 84 years old and did the same thing with my 2012 iMac. Replaced the HD with an SSD and the iMac was even better. Good luck.
Wow impressive! and thank you!
 
The only suggestion I would add is make sure you have the appropriate tools. Watch the videos, and you'll know if you're set there.

Anytime you self repair you have to accept there's the possibility you'll fail. I don't think it's likely based on your iphone experience. However, you have to at least accept and be prepared for the possibility it can happen.
 
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Could anyone recommend a good kit in the UK? Thank you if you can!
 
Have you tried erasing the drive with the bad blocks?
To see if that corrects at least some of the problems?
Don;t think I havent considered it! But in the end, it's just to much of a risk on it going bad again, i think :)
 
When replacing the HDD did you ad a temperature sensor as some videos say to do? I propose installing a 500gb SSD replacement drive
 
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