Audio Systems: Dodge Dakota 2004 CD player, dodge chrysler, chrysler vehicles

Question
My husband has the above vehicle.  He had the battery replaced and ever since the CD player does not work.  (the radio does)  When pressing the eject/load button you can hear the mechanism trying to work, but nothing happens.  Is this a coincidence or does disconnecting the battery in his truck need a code as my Honda does?  I don't know that it ever had a code as there is no alarm on the audio system.  Any thoughts would  be appreciated.

Answer
replacing the battery in this vehicles damage the radios look at my old questions there are over 50 in the past 2 years from dodge chrysler vehicles,
the cd gets stuck or some light flash for no reason

this happends more often if there was a cd inside the radio
radio needs to be repair or replace, there are no codes
good luck