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_note] With the hinge free to move, the iMac will be unbalanced and hard to work on. Repairs are fast and easy with an [product|IF145-224|iMac service wedge|new_window=true], but can be completed without one.|
|[* icon_note] If you are using the [product|IF145-470|iFixit cardboard service wedge], follow [guide|136068|these assembly directions] to put it together.|
|[* black] '''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.|