bad wiring in SB3

Some of the buttons do not work unless the cross fader is in a certain position. Moving the crossfader rapidly also causes some of the buttons to change and makes it impossible to mix. I have tried multiple computers and cables and it still is happening. Is this a wiring issue? Can I try fixing it?https://www.icloud.com/iclouddrive/0706btLR_ZBT-MZoQeS8E4hdQ#IMG_5124