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The April 2014 update of Apple's 13" MacBook Air features refreshed dual-core i5 and i7 processors, plus slightly increased battery performance.

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Help please, what is this component on mainboard MacBook Air?

Hello, Please I need advice. What is this component on my mainboard? I need new but I dont know designation or parameters. Sorry for my english.

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To qualify . It is about Macbook Air 13 2014 (A1466).

The instrument was hit with water and this component is damaged.

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@janys788 that is reference designator Q7706 which is the LCD backlight FET and it is a FDC638APZ For more information on it read the datasheet on here. Looks like this MOSFET is readily available at many different places. So it will depend on where you are located.

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Thank you very much! Do you happen available troubleshooting for this mainboard?

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@janys788 there are no manuals like that around. It would be great if there was. Those incidents do require board level repair. One will have to know how to read schematics, have a boardview document for that particular logic board and have all the right tools to do the trouble shooting.

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Good. I'll try to replace FDC638APZ and Fuse ;) The device was hit water.

I thoroughly cleared to oxidation but FDC and fuse "P" is broken. Backlight dont work.

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this is a transistor, be careful!

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I know it's a transistor.

Need to know the exact designation , I could buy a new one.

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This is the wifi card

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Jakub Janecka estará eternamente agradecido.
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