So I loaded a track but turns out it was a missing file(My fault I was moving stuff around and deleting doubles etc.) anyway that deck completely froze! I could not do anything (the song that was already playing on the other deck kept going fine) I plugged my iPhone into the aux in on the dead deck and faded into that.......... the all of a sudden the frozen decks screen went to all 0's like as if a blank track was loaded.. so I tried to load a song to it again from the computer and a message popped up and said something like "loading to this devices is currently unavailable" or something like that. so I pressed the link button(disconnected) and then reconnected it again and all was back to normal :)