Master Output Issue

The master output levels on my DDJ-RZ are not working. The LEDs light up when i power the unit on but i get nothing when playing tracks.

The LEDs levels on the individual channels on the mixer work fine and i can her the audio. The master levels are showing in Rekordbox fine just not on the controller.

I've tried turning up the master level to the max but still get nothing showing in the master LED levels display.

I've tried this on my Windows 10 home edition laptop and on my Windows 7 Professional PC and have the same issue on both PCs.

I've updated the DDJ-RZ firmware to 1.06 and Rekordbox to 4.0.3 and updated both PCs with the latest Windows updates but still have the issue.