Prime 2 No Audio Output on Deck #1

I have a Denon DJ Prime 2 that I recently bought. Deck #2 outputs music to the speakers totally fine, but deck #1 will not output to speakers. Although it comes through on the headphones. I think I have troubleshot just about everything. Still looking for any advice on possible solutions.

Is the master VU meter showing any sound output when deck 1 fader is up? What sources did you attempt to use? Have you tried the external RCA input?