Doesn't recognize Thunderbolt Display and asks to connect non-existent USB Cable

[Former user]

Brightness Controller doesn't seem to recognize my 27" Thunderbolt Display and asks me to connect a non-existent USB cable. Here's the HID information:

<?xml version="1.0" encoding="utf-16"?> <ArrayOfHidDeviceInfo xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" />