You need to check the roof seals, window seals, and access door seals of your RV at least twice a year. As your TV sits in storage the unit expands and contracts with the changes in weather and temperature. This can cause the seems to crack and leak.
Also, as your RV travels down the road the bumps and ruts cause your RV to flex. Again, this can lead to cracks and leaks in the seams and sealers used on your RV.
This is also a good time to check the inside of your RV. Check the water lines and the fittings to the toilet to make sure all the connections are tight and no leaks have developed. A small drip in the water lines can lead to dry rot damage in the floor or mildewed carpet or flooring.
A maintenance check when you put your TV in storage at the end of the season and again when you get it out of storage will help prevent costly leaks and dry-rot, prolonging the life of your RV.