Microsoft XBOX CONTROLLER Repair Instructions page 41

Remove Bumper
Remove the bumper as detailed in the Procedure – Removal (Bumper)
Procedure – Removal (Mainboard)
1. Position Device
Place midframe thumb stick down on ESD-safe surface.
2. Remove Antennas
Using a plastic pry tool disconnect the two coax antennas from the mainboard.
NOTE:
pads from the mainboard.
The wires and pads on the mainboard are fragile. Take caution not to break
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