I have to second Machek Kozoil's question. What do you do with the yellow contacts? I can get the proximity sensor to work but not the camera. I assume it has to do with these yellow contacts. Any ideas? If anyone knows I will make a youtube video explaining this for others as I haven'y found one yet. In the link below I have included a picture of the factory part on top and replacement part on bottom.
I avoided this repair for a while. My iMac would not turn on, no fans or response of any kind from pushing the power button. Reapir took me less than 30 minutes and was very straight forward.
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