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crwdns2934241:0crwdne2934241:0 Mike Ryan

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Replacing the motherboard and need some instructions.

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I don't know what I'm doing but I took apart my Canon 5d after it's been acting wonky and it looks like one of the little black things on the motherboard is corroded.  I found a motherboard for $190 but no instructions anywhere on how to replace it.  I was also told that Canon may have to "set up" the motherboard after I change it out but I don't know what that means.  Can anyone enlighten me?

The way it acts wonky is after I've used it for a while, the select button won't work or only works when I move it in certain directions and the auto exposure lock will come on randomly and won't turn off on its own or when I take the battery out.  And I've already done a hard reset.

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Canon EOS 5D Mark II

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open