REKORDBOX DJ STACKS AND PICTING

HELLO, PERSONNEL RECENTLY BEING PLAYING ON THE REKORDBOX DJ AND IN A PERFORMANCE, IT STARTED TO FILE A FAULT, LIKE THERE WAS ONE PIECE OF THE SOFWARE SIDE AND THE HEADPHONE OUT. THAT HAPPENED TO TWO MACHINES IN THE SAME YEAR BUT DIFFERENT? KNOW HOW TO SAY WHAT IS THIS OCCURRED?