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Urgent help needed!! I bought new logic board, for my 27” iMac late 2012, I followed the IFIXIT video instruction exactly as showed, and I replaced my board with the new one and afterwards I turned on my iMac and heard the chime, but it has a black screen! I don’t really know what’s wrong, can anyone give me a clear reason for this problem.
Here’s a god video on replacing the display How to Re-Apply Your 27” iMac Display. Often times the display connector gets put in backwards! For reference here’s the iFixit guide on how to replace the logic board iMac Intel 27" EMC 2546 Logic Board Replacement You might want to review it to see if something stands out differently than what you did.
Hello I been servicing HDTV and monitors for over 25yrs, if you replaced the logic board and still get the same issue or no screen, then this may be a panel issue. The panel matrix is faulty and need to replace. Replaced the screen. Also have the power supply checked for Leaky capacitors or ones that are swollen on its tops.
