Help identifying component on A1278

Discussion in 'MacBook Pro' started by Chourizo, Aug 23, 2016.

  1. Chourizo macrumors newbie

    Aug 23, 2016
    After too much wine one night my macbook tasted a bit of it... and it didn't like it.

    After the spill I cleaned everything carefully, but one component is damaged. Could you help me identifying it, so I can order a replacement?

    It is a 6-pin component under the right corner of the LVDS connector on the motherboard. Hard to see from the picture, but pin number 4 is totally gone (trace is good). When I connect power there is no light at all at the magsafe.

    The component has written XNP and YO in vertical. It measures 2.18mm x 2.18mm (SOT-23-6?) and after looking carefully everywhere in the pcb I don't see any other component like this. My guess is that it is a transistor.

    Thanks in advance.


  2. duervo macrumors 68020


    Feb 5, 2011
    May want to look here:

    Also, A1278 is not a unique identifier, so make sure you double-check to get the correct schematic for your system.
  3. Chourizo thread starter macrumors newbie

    Aug 23, 2016
    You are right. Looking at the EMC number I believe my logic board is the K90.

    Anyway, after diving through the schematics I think I found it. I believe the part is Q4262. It can be purchased in Digikey, BSS8402DW-FDICT-ND. I'll change it tomorrow, let's see what happens.

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