The zones for the Jensen RV Stereo w DVD Player # JWM90A are only going to control the speakers, which is why you're hearing the audio but not getting the video. In order for the video to be played through your outdoor tv you'd need an HDMI cable # 324-000012 ran out to the outdoor tv. Most of the time the manufacturer only runs the cable to the tv's inside the trailer so you're most likely not hooked up.
If you are hooked up then we'd be looking at either the tv, cable, or stereo being... view full answer...
On your Dutchmen Voltage Toy Hauler there really isn't a reinforcement option to work. You really need to get to the bottom of the water seeping to fix your issue. It is common for the weather seals to be folded in at the corners and this lack of seal causing water to seep in that location and down the sides. If it is only an issue when the slide is out, then a slide-topper is the route to go. It appears this is common on your Voltage slide as many have commented and double-checking... view full answer...