I'm not familiar with your trailer, but there are a few questions that may help.
Can you still operate the slide?
Does anything using 12volt power work?
Are you plugged into campground power?
Are you plugged into your tow vehicle and have the vehicle engine running?
Have you checked all the circuit breakers and fuses?
Knowing some of the above will help troubleshoot the problem.
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.