Submasters, buttons and LEDs not functioning on ION XE

Symptoms/Issue

ION XE or Standard Fader Wing has one row of buttons and faders that are not functioning properly.

Description/Explanation of Issue

The Ribbon cable connection between the Fader Master PCB and the button/fader PCB has shifted or become loose.

Fix/Solution

1. Power down and open the console.

2. Unplug and inspect the white ribbon cables going between the fader/button PCB and the fader master PCB. 

3. Reseat the cables, reassemble and test.