iMac Intel 17' Power Supply Replacement · iMac Intel 17" Power Supply Replacement Written By: Walter Galan iMac Intel 17" Power Supply Replacement Guide ID: 894 -Draft: 2019-04-02
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iMac Intel 17" Power Supply ReplacementWritten By: Walter Galan
Flip your iMac over and lay it stand-side down on a flat surface.
To lift the front bezel off the iMac, simultaneously:
Use your thumbs to press in the RAM arms and hold the iMac down.
Use your index fingers to pull the small bridge of material on the front bezel toward yourself.
Pull the Front bezel up with your index fingers.
Once the small bridge of material has cleared the RAM arms, lift the front bezel by its lower edgejust enough to clear the bottom edge of the rear case.
Peel back the aluminum EMI tapefrom the two vertical edges of thedisplay.
During reassembly, it is helpful touse several small strips of tape tohold the EMI shielding along the leftand right edges of the displayfootprint out of the way beforelowering the display into the rearcase of your iMac.
A hard drive thermal sensor may be present on some models. If your logic board is missing thehard drive thermal sensor socket highlighted in red in the first picture, skip this step.
Pull the hard drive thermal sensor connector away from its socket on the logic board.
Pull this connector parallel to the face of the logic board toward the top edge of the iMac.
Use a spudger to pry the thermal sensor and adhesive off the hard drive and install it in the samelocation on the replacement drive.
Press the hard drive bracket down tofree it from the rear case, then rotatethe top of the drive toward yourself.
Pressing the top of the hard drivebracket down to release it from therear case requires a substantialamount of force, so we recommendlaying your iMac stand-side down ona table to avoid knocking it over.
If you have trouble releasing thehard drive bracket, it can beremoved from the hard drive, byremoving the two T8 or T10 Torxscrews securing the bracket to thedrive.
Lift the hard drive off its lower pins and pull it out of the rear case, minding the power supply cablesthat may get caught.
When reinstalling your hard drive, be careful not to push the two rubber grommets through theirholes in the chassis. Retrieving them would require removing the logic board.
The next few steps bring your handsclose to the exposed face of thepower supply. Do not touch the faceof the power supply to avoid a highvoltage shock from the many largecapacitors attached to the board.
Unplug the power supply cablebundle from the logic board bysimultaneously depressing thelocking mechanism (toward yourself)with a spudger and pulling theconnector away from its socket.
The locking mechanism faces therear case.
Step 20
If necessary, remove the piece oftape holding the AC-in cable underthe chassis.