I have a ami100a cd jukebox. problem

[phylop]

first time posting.  I think that it's needing a new battery. from what I read from another post I read.   I'm not sure thought I should make sure. 
  It plays fine at first but only for about 2 or 3 minutes then go's to a different song or stops.  It didn't come with a book so I don't know all the codes but when thou a few of the codes.  doesn't seem to change anything.  everything works but it stops the music in the middle of the song.  Could someone confirm this idea or is it something else.  Thanks.

[ed12]

as a rule it should through u 3 service code's
there is a switch in the box
1-way=normal
1-way=service
power off,go to service,power back-up,write down the p-code's
get back to us

ed