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Vent: Everyone told me to replace the whole logic board on that MacBook Air, but I tried something else
Had a 2020 MacBook Air come in last week, no power at all. The usual crew online and even a guy at the local parts store said it was a classic logic board failure, just swap it, bill the customer $700. I wasn't convinced. I pulled the board and spent an hour under the microscope. Found a tiny, burnt looking resistor near the USB-C power input, part number R5510. I had a donor board from a different model with a cracked screen. The resistor looked the same size. I carefully swapped it with my hot air station, set to 350 degrees. Plugged in the charger and the damn MagSafe light came on. Booted right up. I charged the customer $150 for the diagnostic and repair, not $700 plus a new board. Everyone acts like board-level is dead, but sometimes it's just one stupid 10-cent part. Has anyone else had a win with a simple component swap recently that saved a whole machine?
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gavin6925mo ago
Yeah, that resistor is a known weak spot. I keep a little tray of common ones like that from old boards, just for this. @viola_ward is right, it's way too easy to just call it a total loss. Good call checking under the scope first.
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viola_ward5mo ago
Classic. They're always so quick to write off the whole board. Good on you for actually looking at it. Bet that felt pretty sweet.
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richard2265mo ago
Grab a loupe too, sometimes the cracks are too fine to see otherwise. @viola_ward gets it, that save is a great feeling.
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