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for an art installation i need to equipte the laptop with an external power button. i have done this before with older macbook pros and mac minis. but does anyone know where the power on pads are for this model? A1398 thanks

On many models they stopped with pads and from the ribbon cable connector you have to ‘‘‘short short pin 5 to pin 29 or ground’’’. If this Answer is helpful please remember to return and mark it Accepted.

Here are they guys, hope you enjoy it

Update (10/27/2016) Here are they guys in the red circle for MBP A 1398

All due respect] to Machead3 (an excellent contributor), this model does in fact have power-on pads (you by-passed the problem… so this is for future readers of the posting). Take a look at the pic. Here you go… This is a Mid 2012, but I know for a fact (because I opened up my personal early 2013) the pads are in the same place. Sorry if the pic isn’t too clear.