Chosen Solution
Hey everyone. Recently a system update was being installed, when we lost main power. Afterwards, the computer “wouldn’t turn on.” I opened it up and checked the diagnostic LEDs - the first one comes on when the power cable is connected, and the second comes on when the power button is pressed. At this point, the fan starts spinning, but there is no chime, and the third LED does not turn on. I’ve read that the third LED indicates an issue with the video card. Is it likely that the video card needs to be replaced, knowing that this issue happened during a system update (you know, when it says DO NOT TURN OFF)? How should I proceed? Thanks!
Ouch! Not good at all! The lost of power at this critical time point corrupted your systems EFI image. As that was the update process. you interrupted. Time to visit an Apple Store for them to repair your firmware. Explain what happened so they understand what needs to be done. The may talk you into getting the logic board replaced. It shouldn’t need that! The repair depot they send the system to will need to gain access to the logic board to re-burn the firmware from their special tools they have. I’ll be honest here, I’ve not needed to get this done in a long time! So it’s possible they don’t do that anymore.
