Disconnect the two antenna cables attached to the AirPort Extreme card.

The cable with the gray shielding attaches to the left side connector, while the cable with the white shielding attaches to the right side.

If you have a MacBook Pro 17" Model A1229, there are three antenna cables attached to the AirPort Extreme card instead of two.

If you have a MacBook Pro 17” Model A1261 the cable with the black shielding attaches to the left side of the connector, while the cable with blue shielding attaches to the right side. The gray cable isunattached and the end covered.