DVD players occasionally go on the fritz just like any other piece of machinery we use in our daily lives. There can be a number of different problems that could go wrong, but most of them have pretty simple solutions that can be done relatively quickly and with little monetary investment.
Check the connections the DVD player has to the television set to make sure it is hooked up properly and that all connections are still functioning. Sometimes connections can come a bit loose and this can cause you to have problems as well. Tighten up the connections and see if the player begins working correctly.