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Heavy-Duty Suction Cups (Pair)
$14.95
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• Stick a heavy-duty suction cup near each of the two top corners of the glass panel.
• To attach the suction cups, first position the suction cup with the movable handle parallel to the face of the glass panel (as indicated in the second picture).
• While lightly holding the suction cup against the glass, raise the movable handle until it is parallel with the other handle (as indicated by the third picture).
• If your suction cups refuse to stick, try cleaning both the glass panel and the suction cup with a damp soft, lint-free cloth. (Dampen with distilled water, and if needed, an equal ratio of distilled water and white vinegar for best results.)
• Do not use the suction cups to carry the display glass because if one of them fails to stick, you could drop the screen and break it.
• The original iMac box makes a good place to store the glass panel. Otherwise, a padded horizontal surface, like a towel on a desk, will do nicely.
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• Gently lift the glass panel perpendicular to the face of the LCD, enough to clear the steel mounting pins attached along the underside of the top edge of the glass panel.
• Pull the glass panel away from the lower edge of the iMac and carefully set it aside.
• Don't use the suction cups to carry the glass panel—if either one loses its grip, the panel could fall and break.
• After setting the glass panel down safely, be sure to release the suction cups, as the suction force over time can crack the glass.
• During reinstallation, be sure to meticulously clean the inside of the glass panel and the face of the LCD as any dust or fingerprints trapped inside will be annoyingly visible when the machine is turned on.
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crwdns2931653:03crwdne2931653:0 Display
• Remove the eight T10 Torx screws securing the LCD to the outer case.
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• Carefully lay the iMac stand-side down on a flat surface.
• Due to tight tolerances, you will have to use a thin hooked tool to lift the display out of the outer case. As seen in the third picture, we made one out of a bent paperclip.
• Use a thin hooked tool to lift one side of the top edge of the display by its steel outer frame.
• After lifting the top edge of the display on one side, hold it out of the outer case while you use a hooked tool to lift the other side. A pencil or pen can be placed under the top edge of the display, parallel to the top edge and extending past the edge of the computer, to keep the first side propped up while lifting the second.
• Do not lift the top edge of the display out of the outer case too far, as several short ribbon cables still connect the two components.
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Tweezers
$4.99
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• Use a pair of tweezers to pull the vertical sync ribbon cable out of its socket on the LED driver board near the top left corner of your iMac.
• On some iMacs this may not be a ribbon cable but four separate, very fine and very fragile wires. Be very careful, if the tweezers slip off the plug, you will very likely pull a wire out of the assembly.
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• Rotate the display out of the outer case enough to disconnect the LED backlight power cable from the LED driver board.
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• Squeeze the two display data cable connector arms together to unlock it from its socket on the logic board.
• Pull the display data cable connector away from its socket on the logic board.
• Be very careful when disconnecting this cable as both the cable connector and logic board socket are extremely fragile. When reconnecting the cable later, use as little force as possible.
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I just spent 100€ at the Mac shop to learn this: when reattaching the display data cable be sure you get the ends right. Even if the cable fits perfectly the other way round, the computer won't even start.
Julian - Dzi 13, 2012 crwdns2934203:0crwdne2934203:0
NOTE!  The internal video connector on the logic board is quite fragile - proceed with extra care when disconnecting. There are many postings of Mac users who have broken the display connector and are then left with quite a challenging proposition to replace it. Here is the link to one such thread: http://forums.macrumors.com/showthread.p....
thorjurgen - Huk 22, 2013 crwdns2934203:0crwdne2934203:0
Ditto. It is very fragile. Mine pulled off the motherboard while doing the upgrade (all else went well). Problem occurred because I tried to do the drive swap without removing the display. I had someone hold it up for me. Display is heavy and you can't feel the tug of the cable. Disaster.
The repair is beyond most computer repair folks. Found these guys http://www.dttservice.com/ and they are great. For $195 they fixed it in 24hours.
Dave - Mud 20, 2014 crwdns2934203:0crwdne2934203:0
I ran into a big problem with step 7: my display data cable did not have any sort of plug to connect to the logic board. Instead, the cable seemed to be soldered onto the board or simply run under this small copper-colored band. There was no plastic plug to detach/attach.
I was afraid to pull on the cable and break something, so I simply had a friend hold up the LCD and I replaced the logic board without removing the display. I'm not sure what I would have done if I needed to replace the drive.
Has anyone else run into this issue where the display data cable doesn't have a plug? And are there alternative ways to detach it safely?
fronesis - Ndz 23, 2014 crwdns2934203:0crwdne2934203:0
@fronesis - on my iMac it wasn't possible to pull out the connector at first. There was a small rectangular metal clip which locked the connector in place - this had to be pulled up first, and then the connector came out extremely easily.
johnrowell - Nhl 5, 2014 crwdns2934203:0crwdne2934203:0
I'm having blackscreen issue and this cable is my main suspect. Here is my post regarding this issue.
Black screen after SSD install (suspect is monitor cables)
Mads - Ndz 27, 2015 crwdns2934203:0crwdne2934203:0
you will break your computer if you follow this step during the reassemble!
it’s not possible to reconnect the display with the board because the cable is way to short to maneuver the connector in place and you have almost no sight - you’ll not see what you’re doing! the better approach is disconnect the cable on the display as well (since the connector here is more robust) and insert the connector on the board as a first step without having the display in front of your face..
mike - Yan 24, 2018 crwdns2934203:0crwdne2934203:0
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• Lift the display for enough clearance to disconnect the LCD thermal sensor cable connector from its socket on the logic board.
• If your fan is spinning full speed after completion, check this connection or the hard drive's thermal sensor cable. The thermal sensor connector socket is very fragile, so be very careful when you connect back the sensor cable.
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• Carefully pull the display toward the top edge of your iMac and lift it out of the outer case.
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