I'm looking for an inexpensive DVD player that has a repeat function that uses a button to turn it off and on or keeps its programing when the power is turned off. This DVD player is going into a museum exhibit. Currently I have an RCA DRC220N but every night when we power down the exhibit the repeat programming is lost and must be re-programed the next morning. Because of the configuration in the exhibit (the monitor is out in the diorama, and the player is in a closet)it takes two people to reprogram it... something my volunteers can't handle.... I know the Sony DVP-NS315 has a repeat function, but I can't get anyone to tell me if it has the button or holds the programming....HELP!!!! and THANKS!