Help identifying component on A1278

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

  1. Chourizo macrumors newbie

    Joined:
    Aug 23, 2016
    #1
    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.

    photo1
    photo2

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  2. duervo macrumors 68000

    duervo

    Joined:
    Feb 5, 2011
    #2
    May want to look here:

    http://laptop-schematics.com/

    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

    Joined:
    Aug 23, 2016
    #3
    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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