Are you 100% sure the removal of the old logic board went without any errors or damage?
Are you 100% sure the logic board you got was 100% operational? Are you 100% sure you got the proper replacement logic board? Was it because of a severe fall or bump.or because of a liquid spill? It's very possible other hardware (in addition to the logic board) could have been damaged. Why did the first logic board need replacing? For anyone that has any helpful information thank you so much! Im obviously in over my head. After replacing the battery I had difficulty even getting the computer to turn on, well it finally did and now I have noticed it is SUPER SLOW, looking at activity monitor: kernal task is constantly using like 700-900 % of the CPU, the CPU load is pretty much full, and it is using ~500 MB of Memory. I assumed the battery was bad so I replaced that as well.
Well after replacing the logic board and upgrading to sierra, I noticed I couldn't "right click" on the track pad because it was protruding up higher that the left side. Now I know some here probably think I had no business replacing the logic board on my own, but im not here to debate that, just seeking info as to what could be wrong with it now. Well i was able to find a logic board elsewhere for substantially less. I obviously had no intention of paying that amount of money to fix a computer that old. Took it to the apple store and they tested and said logic board was bad. Well last August when finishing up my summer class my mac died and wouldn't reboot got the green screen etc.
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