Redmi Note 9 Pro - Reboots, Power On flex Replacement

Warm up the device to soften the adhesive.

Use plastic tools and a little isopropyl alcohol to separate the back cover.

Remove the Phillips screws that secure the motherboard cover.

Use a plastic opening tool to remove the cover.

Lift up the flex connector to disconnect the battery.

Remove the main cameras.

Remove the SIM tray.

Disconnect all flex cables:

Fingerprint sensor flex cable

Screen flex cable

Main flex cable

Coaxial antenna cable

Remove the Phillips screws securing the motherboard to the middle frame

Remove the motherboard.

Remove the Fingerprint sensor.

Remove the volume buttons plastic cap.

Use isopropyl alcohol to help remove the glued down flex cable.

Use playing cards to remove the flex cable.