Black screen after startup with the chime sound
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.
Cette question est-elle utile ?