If the lights in the kids bunk/slide are still working then its not a fuse as they are all feed from the same 12v line.
Guessing you cut the 12v feed line for the TV in the kids zone and spliced in a cig axu plug? Have you double checked all your splices to make shure you have continuity and the polarity is correct?
Put a meter to the 12v outlet, check fuses in power panel, double check your connects for the plug end you added.
2011 Sunseeker 3170DS - 30,000 miles explored