Mighty Owl

Evenin' all! :grin: My MZN-510 is acting up. when I press play on the unit, it displays "LINE" for 4 seconds (nothing in the line-in socket), then it stops. So, I press play again, and the dreaded "TrProt" message appears. I can only play tracks using a combination of 5 buttons on the unit and the stick remote. Its driving me insane! Can anyone help me before I throw it through a window? Thanks for any replies! :grin: