That is a new trailer. Did you just get it recently? Have you had it for a year, and slide has been flawless till now? Has the slide been going in/out smoothly, no binding, motor not pulling down/straining? Is the slide motor accessible? A little more info would help.
No sound/nothing, suggests no power to motor. If you have a meter, or any means to check where power starts/stops, you should be able to diagnose the problem. That is a small slide, that should not overload a circuit breaker, if it is moving freely. It is likely a loose wire/bad connection, maybe at the switch, or motor. An electrical tester, is better than guesses, although many here, are experienced trouble shooters.
Jerry