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Motherboard has no brain 820-00164-A

Hey guys, I am trying to fix a Macbook air 11 inch motherboard.

Fan spin and green light but no image. All power rails are present and I replaced LCD connector and LED driver.

PCH signal present etc seems CPU dead even though the board will charge battery.

I spend quite a few hours already on this board :)

If you have any ideas or experienced to share.

I have also replaced the bios chip still no chime or image.

regards,

Sebastien

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I also replaced clock processor still no image :)

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Sorry guy once the brain (CPU) is dead thats the end of the logic board.

製品

$159.99

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MacBook Air 11インチ Early 2015