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Repair For MacBook Pro A1989 That Won't Turn On

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Find SoC ROM (U4770) on the motherboard. Remove SoC ROM chip with Hot Air Gun at 430℃.

Get the BY-T200 and write the new SoC ROM data. Attach the chip to the seat of BY-T200. Pin 1 of the chip must align with the red dot on the tool.

Then connect BY-T200 with the computer.

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