简介
Use this guide to remove the logic board and strip it of all its peripherals: SSD, AirPort, heat sink and CPU, and RAM.
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.
-
-
Starting on the left of the display, near the power button, insert the iMac Opening Tool into the gap between the glass panel and the rear case.
-
-
-
With the cards inserted as shown near the corners, gently twist the cards to increase the gap between display and case.
-
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.
-
Begin to lift the top of the display up from the frame.
-
-
-
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.
-
-
-
Use the flat end of a spudger to disconnect each of the four antenna connectors from the AirPort/Bluetooth card.
-
-
-
Pull up on the SATA power cable connector to disconnect it.
-
Unplug the SATA data cable connector by lifting it up.
-
Remove the SATA cable from the logic board assembly to get it out of the way and prevent it from being damaged.
-
-
-
Remove the power supply cable from its connector by pulling it parallel to the logic board.
-
To reassemble your device, follow these instructions in reverse and use our Adhesive Strips Guide to reattach the display glass.
To reassemble your device, follow these instructions in reverse and use our Adhesive Strips Guide to reattach the display glass.
26等其他人完成本指南。
6条评论
HI!
I have a IMac 27"(late 2012) that does not start with power Button! But it starts up "automatically" by connecting automatically programming scheduled through "System Preferences"!
So I wonder if this is a defect of the Power Button, or if it is a defect in the Power Supply, logic Board...
Thanks!
Jairo
Question!
The logic board in my iMac 27" 13, 2 (2546) late 2012 needs to be replaced. Will the logic board from the 27" 14,2 (2639) late 2013 match and fit inside the 27" 13,2 late 2012 housing?
I've looked all over and have yet to find an straight answer. Thanks in advance!!!
I'm in exactly the same boat - can I use the logic board from the next year's model? (I would assume that it wouldn't be a problem since it will physically fit in place). The bigger question is if I can I use my old 3.4 GHz i7 CPU in the newer logic board (that too should work, but...)
Does anybody have the part numbers for the logic boards for this machine (EMC2546) or the late 2013 iMac (EMC2639)? Thanks.
part nr for the 2012 model is 820-3298-A. Part nr for 2013 model is 820-3481-A. CPU's are NOT compatible due to different sockets (1155 vs 1150).
Thanks Miles Muri for asking that question, we know now that the CPU's can NOT be swapped due to the different sockets. Back to my original question...does anyone know if the logic board from the 27" 14,2 (2639) late 2013 match and fit inside the 27" 13,2 late 2012 housing?
The dimensions seem similar enough, but i've read that it's the placment of the USB, etc ports that don't exactly line up and prevents this from being a perfect fit. Thanks in advance!!!