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A1708 / EMC 2978 — Released October 2016, this entry-level MacBook Pro retains its traditional function keys (as opposed to the OLED Touch Bar). The function key version packs an Intel Core i5 and two Thunderbolt 3 ports.

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Fan is not working

I have a macbook pro a1708, the fan is not working. I replaced this but it didn't help.

I can't find any damage on the motherboard, on the 2nd pin of the fan connector output is 5v

I try also the SMC reset.

Hardware diagnose error is PPF004

Do you have any tips?

Answered! View the answer I have this problem too

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Not sure why you jumped to the logic board as you still have the connection pathway to it to check. From the fan units connector within the upper case which then transitions to the keyboard/trackpad cable to the logic board.

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I will check the output voltage of the keyboard/trackpad cable

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@danj Thank you for your tip! I see that this cable have 1 broken pin. I order immediately an new cable and let you know asap!

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Nerd will be eternally grateful.
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