I have a 2005 Sienna with a factory installed video system. I had to change the battery out and now the dvd does not work. I have checked all the fuses and they are working. The unit has juice going thru it, I can eject the disk, and it does she the disk being in the unit. Nothing appears on the unit screen or on the Nav screen. The stereo does not recognize the unit. Is there some kind of reset that I need to do.

Any help????