I replaced logicboard but the ethernet doesn't always work.
I bought a liquid damaged macbook (a1342 2009) and also from someone else a logic board. I succesfully replaced the logic board with the other one, and it booted again. I now type this from that Macbook.
However, I made sure to test everything, and my ethernet won't work. It always says "Cable Unplugged", also when plugged in. When I put the cable into my original macbook, it immediately connects ok, so the cable is fine.
I read this has to do with the logicboard, and I am afraid I need to return it to my seller. Is there anything I could have done wrong that made the ethernet fail? (I don't t know of anything that affects it?) What could I try to get it working?
I do run OSX 10.7, so the mac should be supported fully.
I tried another network cable, and suddenly it did work. But after I wiggle a tiny bit with that cable the connection gets lost, and I need to plug out and plug in again. So still not really working as it should. On my original Macbook, this would not cause disconnection.