Introduction
How to disassemble device and fix restarting problem.
What you need
Video Overview
Xiaomi Redmi Note 9 Pro restarts - Power On flex replacement
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Warm up the device to soften the adhesive.
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Use plastic tools and a little isopropyl alcohol to separate the back cover.
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Remove the Phillips screws that secure the motherboard cover.
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Use a plastic opening tool to remove the cover.
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Lift up the flex connector to disconnect the battery.
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Remove the main cameras.
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Remove the SIM tray.
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Disconnect all flex cables:
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Fingerprint sensor flex cable
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Screen flex cable
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Main flex cable
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Coaxial antenna cable
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Remove the Phillips screws securing the motherboard to the middle frame
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Remove the motherboard.
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Remove the Fingerprint sensor.
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Remove the volume buttons plastic cap.
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Use isopropyl alcohol to help remove the glued down flex cable.
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Use playing cards to remove the flex cable.
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To reassemble your device, follow these instructions in reverse order.
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