Einleitung
Like brain surgery? Use this guide to replace your logic board.
Note: The logic boards of the 1.83 Ghz models are not interchangeable with the 2.0 Ghz+ models. Several connectors are incompatible, including the power supply.
Was du brauchst
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Loosen the two captive Phillips screws securing the access door to the iMac.
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Remove the access door from the iMac.
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Remove the following four screws:
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Three 6 mm T8 Torx.
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One 8 mm T8 Torx.
8mm screw is 2nd from left - useful when reassembly
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Flip your iMac over and lay it stand-side down on a flat surface.
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To lift the front bezel off the iMac, simultaneously:
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Use your thumbs to press in the RAM arms and hold the iMac down.
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Use your index fingers to pull the small bridge of material on the front bezel toward yourself.
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Pull the Front bezel up with your index fingers.
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Once the small bridge of material has cleared the RAM arms, lift the front bezel by its lower edge just enough to clear the bottom edge of the rear case.
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In diesem Schritt verwendetes Werkzeug:Plastic Cards$2.99
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Insert a plastic card up into the corner of the air vent slot near the top of the rear case.
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Push the card toward the top of the iMac to release the front bezel latch.
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Pull the front bezel away from the rear case.
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Repeat this process for the other side of the front bezel.
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If the bezel refuses to release, try pressing the lower edge back onto the rear case and repeat this opening process.
Apple uses a powerful magnet to release these latches, but the official tool is not available. If you have access to a few failed hard drives, you can take out the magnets from those, and stack them up to have a magnet strong enough to easily open these latches.
Simply place the magnet on an upper corner of the machine, and when you hear a click, gently pull the corner of the front case forward. Repeat the process for the other upper corner. Use care not to pull on the iSight cables.
Note: Use care when handling the hard drive magnets, they are powerful, and you don't want them to snap together on your fingers. OUCH!
You can use a credit card. Mine survived, though it did get a little bent.
I used two credit cards for extra thickness and the latches released very easily.
The magnetic latches are about 2-3 cm from the left and right edges right at the top edge of the case. I just ran a rare-earth magnet over the from of the bezel in this area. You can hear it click when it disengages. RadioShack has these kind of magnets for $3, the call them "super magnets".
This was a nuisance. Had to really move the card around to get it to finally release.
Be very careful not to damage the metal clips with a credit card. My iMac was very stubborn and I ended up bending the clips in a way they cannot be bent back. The clips do still work and the front bezel does still go back on, however it no longer sits flush with the back of the iMac.
The double credit card worked for me. Have to be persistent. It's a very light latch, no force needed or anything, or any click when it releases.
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Lay your iMac stand-side down on a table.
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Lift the front bezel from its lower edge and rotate it away from the rest of your iMac, minding the RAM arms that may get caught.
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Lay the front bezel above the rest of the iMac.
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If necessary, remove the piece of kapton tape(it is ok to toss this) wrapped around the microphone and camera cables.
I was able to skip Steps 6 & 7 entirely. The microphone and camera cables had enough slack to flip the front cover off and lie it flat above the rest of the computer.
Step 4 is completely unnessecary. Just lift the bezel up and wiggle it until the metal clips let go. Then lift the bezel straight up.
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Disconnect both the camera and microphone cables.
Make sure the white wire is on the same side of both parts of the connector before reconnecting.
It is possible to reconnect the microphone cable in the wrong/reversed orientation with the connector. The microphone will still work but will be muted and result in a "tinny" sound on the receiver's end.
Can anyone ID these connectors (at least the camera connector) so that I may make an extension (to move the camera out and re-house it myself). I probably have the gear to do the mic already.
Is the camera connector some standard I can order M & F versions online to terminate to an extension cable?
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Remove the two 4.8 mm T6 Torx screws securing the display data cable to the logic board.
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Grab the display data cable connector by its black tab and pull it straight up off the logic board.
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Inverter cable on 24inch iMac pulls off to the left.
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Pull the inverter cable connector straight up off its socket on the logic board.
The inverter connector had a different location for me. It was situated next to the top left corner of the right speaker, just under the display. I didn't figure this out until I actually lifted the display off the computer.
I couldnt get this cable off, so I skipped this step. If you have this problem, just proceed; when you get to step 13, lift the display carefully as this cable will still be attached. You'll now easily be able to grip the connector and remove it.
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Peel back the aluminum EMI tape from the two vertical edges of the display.
The above note sounds as if one should peel the aluminum-foil colored tape back from the frame. Do NOT do this; instead, peel the BLACK-colored aluminum tape back from the display frame to reveal the crevice between the display and the case and the mounting screws you are about to remove.
I didn't actually need to peel anything at all. The screws would have been visible had I looked more carefully.
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In diesem Schritt verwendetes Werkzeug:TR10 Torx Security Screwdriver$5.99
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Remove the four 8 mm with 2 mm thick head coarse-thread T10 Torx screws securing the display to the rear case.
If you really want to tackle it without proper tools: with a non-magnetised thin torx loosen the screw till its ready to come out, then wrap a little bit of duct tape (sticky side out) around the head of a spare thin screwdriver, gently push the duct taped screwdriver on top of the loosened screw. The magic tape will lift the screws out.
When re-assembling, it's also a good way to fish out the screws that missed the holes completely when your expert fingers skills are classed as clumsy.
You must have a magnetized Torx 10, 2 to 3 inches in length to safely get these screws out. Fortunately if you have the T10 you can magnetize it with your iMac.
Inside the front bezel are two magnets that hold your apple remote to the case, simply tap the T10 to the larger magnet 3 or 4 times and test it's strength in holding a weighty screw. You are good to go. I did this and the scary lose a screw into the iMac was diminished with a firm hold in both removal and install.
If you don't have a magnetic screwdriver or they are aluminum screws, you can use this old mechanics tip: Use a small piece of paper or celophane tape on the head of the screw, then press the screwdriver into it, this creates a nice snug hold so you can reinstall the screws.
I was able to slightly bend the plastic case to get my driver to seat. This was the most challenging part of the teardown and reassembly because I did not have the proper tool.
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Lift the display from its lower edge and pull it toward yourself to peel off the EMI shield attached to its top edge.
Steps 14 & 15; If you remove the top screw, and just loosen the bottom screw you can rotate the optical drive clip out of the way, tighten it, then screw the top screw back in to hold the logic board down for later trying to remove the connector. You also save three more parts kicking around on the desktop.
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Remove the 30 mm T10 Torx screw securing the left speaker to the rear case.
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In diesem Schritt verwendetes Werkzeug:Metal Spudger$2.99
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Pull the SATA data cable connector away from its socket on the logic board.
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Disconnect the hard drive power cable by pulling its connector up off the logic board.
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Use the flat end of a spudger to pry the AirPort Extreme antenna connector up off the AirPort Extreme card.
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Disconnect the speaker cable connector by pulling its connector away from the socket on the logic board.
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Pull the power button cable connector up off its socket on the logic board.
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Disconnect the ambient light sensor by pulling its connector up off the socket on the logic board.
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Disconnect the following four connectors by pulling them straight away from their sockets:
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Camera cable.
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Microphone cable.
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Optical drive fan cable.
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Hard drive fan cable.
I could not get a good grip on this connectors and I decided to wait to disconnect. The cables were much easier to disconnect after the optical drive was removed.
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Disconnect the optical drive thermal sensor cable from its socket on the logic board.
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Remove the two 7 mm fine thread T10 Torx screws securing the optical drive clip to the logic board.
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Remove the optical drive clip.
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Squeeze the two optical drive bracket ears together while pulling the drive up toward yourself.
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Pull the optical drive away from the side of the rear case and remove it from the iMac.
The latch on my optical drive does not release no matter how much it is depressed. The latch further from the motherboard released with ease. I am stuck and afraid of damaging the drive or connector if I apply any more force. Does anyone have any tips on how to proceed? I have looked at iMac G5 17" Model A1144 Optical Drive Replacement and used a spudger to no avail.
Ok I followed some advice on another guide and for anyone having trouble you can remove the screws holding the superdrive in to the plastic bracket and then easily remove it. Cheers!
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De-route the bundle of power supply cables from behind the hard drive bracket.
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Press the hard drive bracket down to free it from the rear case, then rotate the top of the drive toward yourself.
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Lift the hard drive (with cables attached) straight up off its lower pins and remove it from the rear case.
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Unplug the power supply cable bundle from the logic board by simultaneously depressing the locking mechanism (toward yourself) with a spudger and pulling the connector away from its socket.
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Remove the following six screws securing the logic board to the rear case:
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Three fine-thread 7 mm T10 Torx.
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Three coarse-thread 7 mm T10 Torx.
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Grab the logic board from its left edge and rotate it out from the rear case, using your other hand to press the RAM arms in enough to clear the rear case.
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Pull the logic board straight out of the rear case, minding any cables that may get caught.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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2 Kommentare
Thanks for this great guide. Managed to fix up a broken iMac and put it back into use. Great stuff!
That is a really, really unnecessarily complex way of fitting a new hard drive. Thanks, but no thanks...
annax - Antwort
annax, if you can suggest a simpler way we're all ears!
Jake Simmonds - Antwort
I found this guide to be very useful. The installation was super easy, especially since I've never opened my iMac before. I was able to skip steps 6, 7, 9, 10 and 14. Wish I had one of those long skinny magnetic torx screwdriver's though. I had to use duct tape to hold the screws on the end of the bit for step 12.
I used this opportunity to vacuum out the dust with mini attachments. Much needed after 3 years ;0)
Awesome site!!! Thanks for sharing your knowledge and saving me time and $$$!
Eric Patten - Antwort
Yes I did it! thanks for this very good manual
Philippe d Anfray - Antwort