iMac Intel 21.5" EMC 2544 RAM Replacement

Replace the RAM in your iMac Intel 21.5" EMC 2544.

Use this guide to install or replace RAM.

Edit Step 1 Display  ¶ 

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Edit Step 1 Display  ¶ 

  • With the hinge free to move, the iMac will be unbalanced and hard to work on. Repairs can be completed as shown, but are faster and easier with an iMac service wedge.

  • 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.

Edit Step 2  ¶ 

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Edit Step 2  ¶ 

  • 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 enclosure.

  • The hub on the iMac Opening Tool will keep you from pushing the wheel in too far. If using a different tool, insert no more than 3/8" into the display. Otherwise, you risk severing antenna cables and causing serious damage.

Edit Step 3  ¶ 

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Edit Step 3  ¶ 

  • Use the tool like a pizza cutter—roll it along through the gap, and it will cut the foam adhesive through the center.

  • Be sure to always push with the handle behind the cutting wheel. If you pull, the wheel might get pulled out of the handle.

  • Run the tool up along the left side of the display.

Edit Step 4  ¶ 

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Edit Step 4  ¶ 

  • Continue running the tool up around the top left corner.

Edit Step 5  ¶ 

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Edit Step 5  ¶ 

  • Cut the adhesive along the top left of the display.

Edit Step 6  ¶ 

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Edit Step 6  ¶ 

  • Continue along the top of the display.

  • You may want to run the tool back and forth through what you've already cut a few times, to ensure you get as much of the adhesive separated as possible.

Edit Step 7  ¶ 

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Edit Step 7  ¶ 

  • Push the tool around the top right corner of the display.

Edit Step 8  ¶ 

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Edit Step 8  ¶ 

  • Wheel the tool down along the right side of the display.

Edit Step 9  ¶ 

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Edit Step 9  ¶ 

  • Finish pushing the opening tool to the bottom of the right side of the display.

  • At this point, you'll want to run the tool back around the entire display, to ensure you cut as much adhesive as possible.

Edit Step 10  ¶ 

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Edit Step 10  ¶ 

  • While the opening tool cut most of the adhesive, the display will still be slightly adhered to the case. A plastic card will be necessary to free up the last of this adhesive.

  • Set the iMac face-up on a table.

  • Starting from the top right corner of the iMac, wedge a plastic card between the display and frame.

  • Be careful not to insert the plastic card more than 3/8", or you may damage internal components.

Edit Step 11  ¶ 

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Edit Step 11  ¶ 

  • Gently twist the plastic card sideways to create a gap between the display and frame.

  • Move slowly and be careful not to stress the display glass too much—you only need to make a gap of about 1/4".

Edit Step 12  ¶ 

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Edit Step 12  ¶ 

  • Slide the card toward the center of the display to cut any of the remaining adhesive along the top right corner of the iMac.

  • Be sure to stop before the iSight camera, or you may damage it.

Edit Step 13  ¶ 

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Edit Step 13  ¶ 

  • Wedge the plastic card into the top right corner once again and let it stay there to keep the adhesive from resettling.

Edit Step 14  ¶ 

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Edit Step 14  ¶ 

  • Insert a second plastic card into the gap between the display and frame located near in the top left corner of the iMac.

Edit Step 15  ¶ 

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Edit Step 15  ¶ 

  • Gently twist the card upward, slightly increasing the space between the display and frame.

  • As with the other side, twist slowly to allow the adhesive time to separate, and be careful not to over-stress the display glass.

Edit Step 16  ¶ 

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Edit Step 16  ¶ 

  • Slide the plastic card toward the center, again stopping just before the iSight camera.

Edit Step 17  ¶ 

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Edit Step 17  ¶ 

  • Wedge the plastic card back into the top left corner.

Edit Step 18  ¶ 

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Edit Step 18  ¶ 

  • With both plastic cards inserted as shown near the corners, gently twist the cards sideways 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 remaining adhesive.

  • Begin to lift the top of the display up from the frame.

  • Only lift the display a few inches—the display data and power cables are still connected to the logic board.

Edit Step 19  ¶ 

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Edit Step 19  ¶ 

  • While holding the display up with one hand, use the other hand to unplug the display power cable. Make sure that you pull the cable out from the plastic tab, and not by pulling on the color wires.

  • Lift the display up enough to have easy access to the connector, but not so much that you stretch the cables and stress their connections (about 8").

Edit Step 20  ¶ 

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Edit Step 20  ¶ 

  • Use the tip of a spudger to flip up the metal retaining bracket on the display data cable.

  • Carefully pull the display data cable from its socket on the logic board.

  • Be sure to pull the display data cable connector straight out of its socket.

Edit Step 21  ¶ 

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Edit Step 21  ¶ 

  • Lift the display up to a near-vertical position.

  • At this point there is still a strip of adhesive along the bottom of the display, that will hold the display to the frame like a hinge. You can loosen this adhesive by working the display up and down a few times.

Edit Step 22  ¶ 

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Edit Step 22  ¶ 

  • If necessary, a plastic card can be used to cut any remaining sections of the bottom adhesive strip.

Edit Step 23  ¶ 

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Edit Step 23  ¶ 

  • Lift the display up from the frame and remove it from the iMac.

  • It may be necessary to slowly lift from one side, to peel against the remaining adhesive.

  • Be very careful handling the display—it's big, heavy, and made of glass.

  • Upon reassembly, now is the time to go to the Adhesive Strips Guide after cleaning off all the old adhesive. iMac Intel 21.5" EMC 2544 Adhesive Strips Replacement

Edit Step 24 Right Speaker  ¶ 

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Edit Step 24 Right Speaker  ¶ 

  • Use a spudger to loosen the right speaker cable's connector from its socket on the logic board.

  • It is useful to push downward on both short sides of the connector to "walk" it out of its socket. Be careful with the corners of the connectors, they can be easily broken off.

  • Pull the connector downwards to remove it from its socket.

Edit Step 25  ¶ 

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Edit Step 25  ¶ 

  • Remove the two 10.0 mm T10 screws securing the right speaker to the rear enclosure.

Edit Step 26  ¶ 

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Edit Step 26  ¶ 

  • Pull the top of the right speaker away from the rear enclosure, about half an inch, to expose the antenna cable running down its right side.

Edit Step 27  ¶ 

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Edit Step 27  ¶ 

  • Insert the tip of a spudger between the right speaker and the antenna cable that is routed into the speaker's right side.

  • Run the spudger down along the right side of the speaker to pry the antenna cable from its channel in the right speaker.

Edit Step 28  ¶ 

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Edit Step 28  ¶ 

  • Pull the right speaker straight up about an inch, toward the top of the iMac.

  • Lift the right speaker straight up and remove it from the iMac. This may take some force, both hands and rocking the speaker right and left to get it out.

Edit Step 29 Hard Drive Brackets  ¶ 

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Edit Step 29 Hard Drive Brackets  ¶ 

  • Remove the following screws securing the hard drive bracket to the rear enclosure:

    • Two 21 mm T10 Torx screws from the left-hand hard drive bracket.

    • One 9mm T10 Torx screw.

    • One 27 mm T10 Torx screw.

Edit Step 30  ¶ 

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Edit Step 30  ¶ 

  • Remove the left and right hard drive brackets from the iMac.

Edit Step 31 Power Supply  ¶ 

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Edit Step 31 Power Supply  ¶ 

  • The next few steps bring your hands close to the exposed face of the power supply. Do not touch the face of the power supply to avoid a high voltage shock from the many large capacitors attached to the board.

  • Use the tip of a spudger to push each side of the power button cable connector and gently "walk" it out of its socket.

Edit Step 32  ¶ 

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Edit Step 32  ¶ 

  • Gently push upward on each side of the power supply control cable connector with the tip of a spudger to gently "walk" it out of its socket.

Edit Step 33  ¶ 

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Edit Step 33  ¶ 

  • Remove the two 7.2 mm T10 screws securing the power supply to the rear enclosure.

Edit Step 34  ¶ 

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Edit Step 34  ¶ 

  • When working on the power supply, 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.

  • Tilt the power supply forward.

Edit Step 35  ¶ 

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Edit Step 35  ¶ 

  • Pull the power supply slightly up and out from the rear enclosure.

  • Rotate the power supply counterclockwise, lifting the right side up about an inch higher than the left.

Edit Step 36  ¶ 

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Edit Step 36  ¶ 

  • Slide the power supply to the right to clear the screw posts on the rear enclosure.

Edit Step 37  ¶ 

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Edit Step 37  ¶ 

  • Rock the power supply forward and remove it from its recess in the rear enclosure.

  • Do not try to completely remove the power supply from the iMac yet—it is still connected to the logic board.

Edit Step 38  ¶ 

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Edit Step 38  ¶ 

  • 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.

  • Flip the top of the power supply towards you to access the DC power cable connection behind the logic board.

  • Squeeze the DC power cable connector tab and pull it straight out of its socket on the back of the logic board.

Edit Step 39  ¶ 

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Edit Step 39  ¶ 

  • You may find it helpful to set the iMac down on its back on the table for the next couple of steps.

  • Use the flat end of a spudger to push the clip on the side of the AC inlet cable connector inward.

  • While holding on the release clip with the spudger, grasp the AC inlet cable, and pull the connector straight out of its socket.

Edit Step 40  ¶ 

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Edit Step 40  ¶ 

  • Remove the power supply from the iMac.

Edit Step 41 Fan  ¶ 

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Edit Step 41 Fan  ¶ 

  • Gently pull the fan cable connector straight away from its socket on the logic board.

Edit Step 42  ¶ 

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Edit Step 42  ¶ 

  • Remove the three 12.3 mm T10 shoulder screws securing the fan to the rear enclosure.

Edit Step 43  ¶ 

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Edit Step 43  ¶ 

  • Remove the fan from the iMac.

Edit Step 44 Hard Drive  ¶ 

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Edit Step 44 Hard Drive  ¶ 

  • Lift the hard drive from the edge nearest the logic board and pull it slightly out of its recess.

  • The hard drive is attached by two cables, do not attempt to fully remove it from the iMac.

Edit Step 45  ¶ 

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Edit Step 45  ¶ 

  • Disconnect the SATA power cable.

Edit Step 46  ¶ 

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Edit Step 46  ¶ 

  • Unplug the SATA data cable from the hard drive.

Edit Step 47  ¶ 

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Edit Step 47  ¶ 

  • Remove the hard drive from the iMac.

Edit Step 48 Hard Drive Tray  ¶ 

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Edit Step 48 Hard Drive Tray  ¶ 

  • Remove the single 7.2 mm T10 screw securing the hard drive tray to the rear enclosure.

Edit Step 49  ¶ 

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Edit Step 49  ¶ 

  • Remove the hard drive tray from the rear enclosure.

Edit Step 50 Logic Board Assembly  ¶ 

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Edit Step 50 Logic Board Assembly  ¶ 

  • Push on each side of the left speaker cable connector with the tip of a spudger and gently "walk" it out of its socket.

Edit Step 51  ¶ 

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Edit Step 51  ¶ 

  • De-route the left speaker cable by pulling it straight up out of the retaining clip in the back of the rear enclosure.

Edit Step 52  ¶ 

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Edit Step 52  ¶ 

  • In a similar fashion as the previous step, de-route the SATA data and power cables up out of the retaining clip.

Edit Step 53  ¶ 

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Edit Step 53  ¶ 

  • Use the flat edge of a spudger to flip up the metal retaining bracket on the iSight camera cable connector.

  • Pull the iSight camera cable straight out of its socket on the logic board.

  • This is a delicate connector that can be easily damaged.

Edit Step 54  ¶ 

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Edit Step 54  ¶ 

  • Use the flat edge of a spudger to disconnect each of the four antenna connectors from the AirPort/Bluetooth card.

  • Note the original positions for each connector when reconnecting the cables.

Edit Step 55  ¶ 

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Edit Step 55  ¶ 

  • Use the flat edge of a spudger to pry the headphone jack cable connector from its socket on the logic board.

  • Push the cable slightly to the right.

Edit Step 56  ¶ 

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Edit Step 56  ¶ 

  • Remove the following screws securing the exhaust duct to the rear enclosure:

    • Two 6.3 mm T8 screws

    • Two 4.7 mm T8 screws

Edit Step 57  ¶ 

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Edit Step 57  ¶ 

  • Remove the four 7.2 mm T10 screws securing the logic board to the rear enclosure.

Edit Step 58  ¶ 

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Edit Step 58  ¶ 

  • Tilt the top of the logic board away from the rear enclosure.

  • Lift the logic board straight up and out of the iMac.

  • Be careful not to snag the board on any of the rear case's screw posts.

  • The I/O boards at the bottom of the logic board will be the greatest challenge. It is recommended to pull gently to avoid any damage.

Edit Step 59 RAM  ¶ 

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Edit Step 59 RAM  ¶ 

  • Release the tabs on each side of the RAM module by simultaneously pushing each tab away.

  • The RAM module should pop up slightly from its socket.

  • Grab the top left and right corners of the RAM module and carefully pull it straight out of its socket.

  • Repeat the process to remove additional RAM modules as necessary.

To reassemble your device, follow these instructions in reverse and use our Adhesive Strips Guide to reattach the display glass.

For more information, check out the iMac Intel 21.5" EMC 2544 device page.

Required Tools

TR8 Torx Security Screwdriver

$4.95 · 24 In stock

Spudger

$2.95 · 50+ In stock

TR10 Torx Security Screwdriver

$1.95 · 50+ In stock

Plastic Cards

$2.95 · 50+ In stock

Related Products

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Comments Comments are onturn off

I used the iMac Opening Tool just as shown starting in step 2 to separate the tape. DISASTER! The screen cracked! I used the tool slowly and carefully and despite this, the screen cracked. I should have simply used a guitar pick. That said, I decided to see if I could upgrade the 8GB RAM to 16GB RAM WITHOUT removing the logic board all performing all of these steps. I found I could simply remove the FAN assembly as shown in step 43. This makes enough room to reach behind the logic board and unclip the 2 memory modules. I installed 2 8GB modules (1600MHz DDR3L SO-DIMM PC12800 204 Pin) without much trouble. I used a plastic stick to reach behind the logic board and unclip the existing memory modules, then carefully inserted the new ones and clipped them into place. This is much easier than performing all of these steps.

gcortesi, · Reply

I broke off one of the antenna connectors when I took off the antenna wires, but the new 802.11ac card is working:) I seems the way to take off the wires is lifting it up from the wire side. In hindsight I just wasn´t careful enough.

Runar Vaernes, · Reply

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