
iMac Intel 27" Teardown
Teardown
Teardowns provide a look inside a device and should not be used as disassembly instructions.
Featured Guide
This guide has been found to be exceptionally cool by the iFixit staff.
We're doing a teardown of the newest (and largest) iMac in Apple's line-up -- the 27" Intel iMac! We disassembled this iMac on October 21, 2009.
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Check out the super-fast video slideshow of the teardown! It has banjo music!
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Step 1
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iMac Intel 27" Teardown
We spared no expense to bring you the latest and greatest. We have in our studio the biggest iMac money can buy.
The new iMac dwarfs the 20" iMac we took apart earlier this year.
The most obvious feature of this new iMac is the new 27" LED backlit display. The display boasts a 2560x1440 resolution, 16x9 full HD.
Also in the box is a brand new Magic Mouse. We already tore it apart.
Most of Apple's promotional photos show the iMac both running and sans power cord. It looks a lot nicer that way, but unfortunately our unit required the power cord before it would turn on.

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Step 2
Nine ports. These are identical to the previous revision, but the Mini DisplayPort has a new trick up its sleeve.
This iMac sports a cool new feature that allows you to display video from external sources on the internal display. Apparently, that's to hook up your Blu-ray player externally since the machine still doesn't include an internal Blu-ray drive.
Unfortunately, this feature requires an adapter. Where is the adapter? Not in the box. The manual says "Required cables and adapters are sold separately" Not that we're surprised, all you get in the way of cables is a power cable. Yes, Apple thinks cables are from the devil.

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Step 3
Like earlier iMacs, the RAM slots are hidden beneath an access door at the bottom of the iMac. A Phillips #2 screwdriver makes quick work of the three screws.

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Step 4
You can now install a whopping 16 GB of RAM in your iMac! In a very welcome move, Apple doubled the number of slots, enabling you to install four 4 GB PC3-8500 chips.
Naturally, we just had to see for ourselves. Apple's not kidding, if you have the cash, you really can have 16 GB of RAM in your iMac! 16 GB will set you back $1,400 from Apple, or $1,000 from us.

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Step 5
The new iMac features an edge-to-edge glass. This is different from the 4 mm aluminum bezel that surrounded the glass on the previous iMac. Hopefully Apple's got some pretty strong magnets to keep the glass where it belongs. After upgrading the RAM in our iMac, we noticed the glass was slightly out of alignment on one side.
Two suction cups, two steady hands, and the enormous glass panel lifts up.
Hopefully you're not following along at home, as this can be a little tricky. If you do have an older iMac that needs surgery, we now have detailed repair guides for many iMac models.

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Step 7
The LG manufactured LCD panel weighs in at nearly 11 lbs! Then again, it is a massive 27" beauty.
The resolution is a very impressive 2560x1440. That's the same horizontal resolution as a 30" Apple Cinema Display!
This display uses In-plane switching (IPS) technology, providing a wider viewing angle and better color reproduction than cheaper Twisted nematic (TN) technology.
The panel is very glossy. It's great for spying on those behind you, as well as watching movies.
It appears to be model number LM270WQ1. A Google search of that model currently yields five results, and only one of those is in English.

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Step 8
This isn't nearly as pretty as the front, but there's some things worth noting here.
There are four cables that connect the LCD to the iMac:
DisplayPort
Temperature sensor
LED backlight
LED backlight sync
The key thing to note is that there's no special shortcut from the LCD to the external Mini DisplayPort connector. The signal will need to go through the logic board, so you'll need to have your iMac powered on if you want to display from an external video source.
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