The manual seems to imply I can use both, but I did put in some headphones. The strange thing about it, it does not begin to play, no progress bar for the song is displayed, literally clicking play nothing happens.
My next port of call is to try from a SD card and see if anything changes. Its not really the end of the world, for an old piece of hardware its a very pleasant thing to read on. With or without music it will see me through till I decide to buy a new kindle.
Just struck me as odd and left me head scratching, maybe some one who still owns one will breeze by.
Thanks for the reply though!