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Edit by Carsten Frauenheim

Edit approved by Carsten Frauenheim

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[title] Install the iMac service wedge
[* black] With the hinge free to move, the iMac will be unbalanced and hard to work on. Place an [product|IF145-470|iMac service wedge|new_window=true], in the stand to stabilize the iMac.
+ [* icon_note] If you are using the [product|IF145-470|iFixit cardboard service wedge], follow [guide|136068|these assembly directions] to put it together.
[* icon_note] ***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.
[* icon_caution] ***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.