windjammer 3001W owner
Don't have the same trailer but just bought a new rockwood windjammer, and also had trouble with Dvd working. After much time spent and getting frustrated, I went into Input on tv remote and switched from cable/antenna to video and like magic the picture appeared. I had tried the input key, but you have to move around on the menu area. The manual should be much clearer. This is my 2nd rockwood, and my other dvd player worked as soon as dvd was put in. Now, I will have to remember the steps next time to make it play! Don't know if this helps but good luck!