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1.8 or 2 GHz G5 processor

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Where does this little piece go and is it crucial that I put it back?

After working on my 20” iMac, having lifted the logic board and reassembled, I found this little piece leftover. Can anyone tell me where it goes and if it’s important that I put it back, as I don’t really want to take the whole thing apart again…

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This is an EMI conductive foam to transfer the energy from one surface to another. Its not needed.

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Thanks. Any idea where it goes specifically for this logic board?

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@jmrlachance - Its not on the logic board, its part of the case mating surfaces. I've posted an image in my answer.

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