소개
Replace or upgrade the CPU. Don't forget to apply a new layer of thermal compound before reassembling your iMac.
Follow our thermal paste guide for instructions on cleaning and preparing the thermal surfaces and applying a new layer of thermal compound onto the CPU and GPU dies.
Before beginning any work on your iMac: Unplug the computer and press and hold the power button for ten seconds to discharge the power supply's capacitors.
Be very careful not to touch the capacitor leads or any exposed solder joints on the back of the power supply. Only handle the board by the edges.
필요한 것
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이 단계에 사용된 도구:iMac Intel 27" Cardboard Service Wedge$4.99
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With the hinge free to move, the iMac will be unbalanced and hard to work on. Repairs can be completed with the iMac laying down, but are faster and easier with an iMac service wedge.
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If you are using the iFixit cardboard service wedge, follow these assembly directions to put it together.
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이 단계에 사용된 도구:Plastic Cards$2.99
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Set the iMac face-up on a table.
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Starting from the top right corner of the iMac, insert a plastic card between the display and frame.
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With the cards inserted as shown near the corners, gently twist the cards to increase the gap between display and case.
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If there are any sections that seem to stick and won't separate, stop twisting and use one of the cards to cut the adhesive in the problem area.
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Begin to lift the top of the display up from the frame.
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If there is a wire or cable underneath adhesive tape, always pull the tape off first.
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If the cable is glued to the chassis, use a heated iOpener or a hair dryer to soften the adhesive first. You can then slide an opening pick underneath the cable to loosen it. Never pull directly on the delicate connectors.
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Slide an opening pick underneath the foam cushion pieces to separate them from the display, and gently pull them off. You may need some double sided tape to re-attach them to the new display.
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Use a Phillips screwdriver to remove the nine 3.2 mm screws securing the support bracket.
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You may need to peel up the display adhesive lining the bottom edge of the iMac enclosure to access the screws.
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Use the tip of a spudger to disconnect the fan cable's connector from its socket on the logic board.
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Use the flat end of a spudger to disconnect each of the four antenna connectors from the AirPort/Bluetooth card.
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Leftmost
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Top
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Upper right
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Lower right
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Insert the flat end of a spudger between the CPU and heat sink.
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Gently pry the CPU up by slightly twisting the spudger.
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Remove the CPU from the heat sink. Be careful not to touch the contacts.
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Replace the backing plate on the motherboard, and hold it in place while you turn the board over so the side with the CPU socket faces up.
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Before installing the heat sink, see our thermal paste guide for instructions on cleaning and preparing the thermal surfaces and applying a new layer of thermal compound onto the CPU and GPU dies.
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For the VRAM chips surrounding the GPU, install thermal pads or a thick thermal paste such as K5-PRO, rather than regular thermal paste.
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The CPU
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The GPU
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The VRAM chips
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The heat sink plates
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Align the holes on the CPU section of the heat sink with the pins on the backing plate.
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Set the heat sink straight down on the CPU, GPU, and VRAM chips.
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Place the spring plate on the backing plate.
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Carefully thread one of the CPU heat sink screws slightly into the heat sink so that just a couple threads are engaged.
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Press down on the opposite corner of the spring plate from where you just installed a screw.
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While holding the corner down, thread another screw into that corner of the heat sink, again just tightening it until a couple threads are engaged.
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Repeat the process of pressing down the spring plate and slightly threading in the screws to install the remaining two heat sink screws.
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Tighten the screws down a little at a time in the same order that you installed them—in an "X" pattern starting at one corner and then crossing to the opposite corner.
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To reassemble your device, follow these instructions in reverse and use our Adhesive Strips Guide to reattach the display glass.
Take your e-waste to an R2 or e-Stewards certified recycler.
Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.
To reassemble your device, follow these instructions in reverse and use our Adhesive Strips Guide to reattach the display glass.
Take your e-waste to an R2 or e-Stewards certified recycler.
Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.
다른 64명이 해당 안내서를 완성하였습니다.
댓글 71개
So is the CPU soldered on to the board or not? Your guide says it's soldered but the pictures show it as being stuck to the heatsink.
dibble9012 - 답글
it is not soldered
Can i use the cpu lga 1150 for desktop i7 4790 to replace for the factory's cpu. Please reply to me soon.
When i removed the display to upgrade. After that, i have a hardware problem, can i use apple care or not
Thanks all
thaipl1991 - 답글
I do believe the 2014 is the LGA1150 socket however in late 2015 after intel released the Skylake platform the socket most likely has changed to the LGA 1151. Upon further reading on the page under the link the description states soldered so no more cpu swaps i Guess short of a clean room and some really skilled electronics technicians. This is the link where I found the info on the Late 2015 iMac 17.1: http://www.everymac.com/systems/apple/im...
Someone finished this successful in the late 2015 model? Worked fine after?
