My logic board was hung up on the left side with the plastic retainer or the two grounding tabs not giving up the ghost. There is no good picture of this on this procedure. If you go the the heat sink replacement procedure you can see a pretty good bit of it below the presenter’s right thumb in the opening pic and in a larger pic at step 27. Not that the logic board assembly can move much while seated I was able to shift (ever so slightly) the black plastic backside to the right and the board finally unlatched and came out. I was so worried that I was going to over force it and break something, you know, like the logic board. Not sure if I have a solution other than don’t force it. If it seems hard and one side seems to have a screw or other some such locking device stop forcing it and try shifting the logic board to the side opposite were it is catching.
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