27 Imac Late 2013 Logic Board Button Function Imac Intel 27 Emc 2639

Chosen Solution

I’m perplexed! I don’t see any button on the Late 2013 replacement boards or boardview as you can see here:

You’ll need to ID the board by its board number as an example this was from a 820-3478 board which is the Late 2013 27” iMac logic board. Locate the 820-xxxx number it is part of the copper ground plane trace which is hard to see.