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Upgrade Guide - Step-by-Step Instructions with Photos
Applicable to iMac 2007, 2008 and 2009 models (both 20 and 24 inch):
- iMac 2007 models MA876LL/A, MA877LL/A, MA878LL/A
- iMac 2008 models MB323LL/A, MB324LL/A, MB325LL/A
- iMac 2009 models MB417LL/A, MB418LL/A, MB419LL/A, MB420LL/A
Step 1
Take a good look at your iMac AL - no screws (besides the memory upgrade slot) to be seen - how neat.
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In order to open your iMac, you will need to lift up the protective glass covering your display. The glass is held by several magnets only, so you just need to lift it up. Naturally you won't be doing this with a screwdriver beneath the glass as you will damage the frame for sure.
You need suction cups to lift up the glass.
If you don't have specialized suction handle tools, using kitchen \ bathroom hook cups will do just fine. You will need about 4-6 of these, 1 to 2 inches in diameter.
Place the suction cups as shown on the photos. You might want to use a rubber string to tie up all suction cups (as shown on the photo) in order to have a grip at all suction cups simultaneously (otherwise you can try lifting up the suction cups with your bare hands
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Once you lift up the glass, put it aside on a soft cloth. Finally we can see some screws in the frame! Use your Torx screwdrivers to take out all screws within the frame. Once you're done, lift up the upper side of the frame only, but carefully, as in the upper mid section (behind the integrated iSight camera), there will be a wire you need to disconnect (as shown in photos).
Update 2: One of our readers reminds there are various length screws you will be taking out - what he suggests is using a piece of 8.5 x 11 (or A4) paper and taping the screws with scotch tape on the paper in the proper location such that it would remind you as where do they go back (thank you Doug)!
Update 3: Some readers have reported they've managed to make the upgrade without disconnecting the iSight cable - leave it plugged in and just flip over the front panel at your desk (thank you Claudio).
Step 2
Now make sure you take off the bracket from the memory slot at the bottom of the frame. If you don't do this, you won't be able to take off the frame.
Once you've put the memory slot bracket away, you may lift up the display frame entirely and set it aside.
Step 3
At this point we've unleashed the inside of your iMac AL - I truly admire Apple's compact design
The next thing we need to do is to detach iMac's gorgeous display. Make sure you do this with utmost patience as you don't want to be responsible for any dead pixels in the process!
The display is attached with three connectors. The first two you can find on the left and the right hand side of the bottom of the motherboard. Let's start with the right-hand side connector first -- this connector is locked in with a screw - thus you need to take it off and pull out the connector. Now we move to the left-hand side connector - just unplug it carefully. You might want to use a precision screwdriver to help you out in the process.
Update: One of our readers managed to upgrade the hard drive without removing the display - althought I've found it to be a lot easier to swap the hard drive with the display off.
Step 4
The third connector attaching the display is located underneath the display, in the upper left corner of it. The next step is to lift up the display VERY carefully from its right hand side and up (as shown in the picture), and you need to detach the third cable - which is a power connector connecting it to the power board (smaller blue board shown in photos).
In my case, I had to take off the screw holding the power board in place first in order to be able to take off the connector. You might want a second pair of hands helping you with this step (holding the display in the air while you pull out the power connector beneath it)!
Update: One of our readers reminds there are two screws on the side of LCD you need to remove in this step in order to lift the screen (please read the comments section at the end of this page).
Once you detach display power connector, you are ready to entirely lift off the display and place it aside. Make sure you put the display on a soft and safe place, away from the tools and work area (you don't want to damage it)!
Step 5
Finally, we can see the hard drive placed in the middle upper section of iMac's aluminum back frame. In order to take out the hard drive, you must first take off the temperature sensor from the drive (as shown in photos). The temperature sensor looks like an ordinary transistor component. Make sure not to bend its pins as it may damage it!
Next, pull out the SATA and power connector from the hard drive (left hand side of the drive in my photos).
Step 6
For this step you will need to apply a bit of force - you need to push down the plastic handle attached to the upper part of the hard drive - push down until it unlocks and lift up the drive. Alternatively, the handle is held up with two screws, so you might want to take these off and slide out the handle easily out of its place.
Step 7
The hard drive side opposite to the plastic handle has two metal pins screwed in - holding the hard drive's bottom side within the frame. Take (unscrew) these pins from the original hard drive and put them onto the new hard drive. Also, move the plastic handle from the old hard drive onto the new one (held up by two screws only).
Step 8
Use the backward logic to put back the new hard disk in place, bottom side with pins going into the frame first, then you snap it into the place by pushing the upper side handle into the frame (as show in photos)
Step 9
Attach the hard disk temperature sensor at approximately the same place where it was on the old hard drive. Use some glue if necessary (in my case there was enough adhesive left on the sensor, so I've just pushed it onto the drive and it stuck). Make sure you put the protective sponge on the top (as it was on the original hard drive).
Plug in the SATA and power connector to the drive (left-hand side of the drive in my photos).
Step 10
It's time to put back the display -- we'll use the reverse logic - you need to plug in the power connector first (left hand side of the display) into the blue power board). Then place back the display firmly in its place - as shown in the photo. You might want a second pair of hands helping you with this step.
Then attach the two remaining display connectors at the left and right hand side at the bottom of the system motherboard.
Step 11
Put the aluminum front panel back into its place (starting with the bottom side first), making sure you connect the integrated iSight camera wire at the top before entirely closing up the frame.
Then put all the screws you've taken out back into their places within the frame.
Update: Make sure the silver piece (the protective foam) around the RAM slot is tucked back in as putting back the front panel will be much smoother (thank you Vincent).
Step 12
Before putting the protective glass back onto the display, you might want to wipe it off and the display itself with a soft cloth (e.g. such are cloths used to clean reading glasses) in order to get rid of the dust particles that have fallen at the display in the mean time. Please take care of what kind of cloth you use - you don't want to unnecessarily scratch your display!
You are ready to put back the protective glass on top of your display. Use suction cups to handle the glass. Make sure you put it back carefully, as magnets will snap it into the place.
Step 13
Put back the protective bracket onto the bottom memory slot (upgrading your RAM is as easy as plugging in the new memory modules into the slots).
Upgrading the RAM (optional step for those upgrading the RAM as well)
Your iMac (all three models 2007, 2008 and 2009) has
two memory bays (slots) available
First, you need to determine how much memory you already have installed and if one or both memory bays are being used. You can identify this by clicking on the Apple logo (upper left corner), then by clicking on About This Mac.
in About This Mac window you can find out how much memory do you have installed in total, however we also need to know if only one or both memory bays have been used. In order to find this out, clik on More Info button at the bottom of the window.
Selection of more info will display System Profiler window - in there click on the Memory menu option on the left hand side and you'll be able to see the capacity of individual memory sticks installed in your machine and if one or both memory bays are occupied.
iMac 2007 screenshot shows 667Mhz memory modules installed:
iMac 2009 screenshot shows 1066Mhz memory modules installed:
Usually Apple has shipped 2GB and 4GB configurations with both memory bays used (2 x 1GB memory sticks or 2 x 2GB memory sticks - one in each slot).
Please note that iMac 2007 and 2008 models are upgradeable to 6GB max. RAM memory, whereas iMac 2009 model only is upgradeable to 8GB max. RAM memory.
RAM Upgrade options
Depending on how much memory do you already have and which memory bays are used provides you with a number of upgrade options. For ease of communication we've made the following table for your reference.