Sony Net MD Walkman MZ-N910 Portable MiniDisc Recorder "cd player spins stops sound" Questions

...CD to my Sony MZ-G755 minidisc recorder the sound drops out after about 40 mins. The sound is reaching the minidisc because I can hear the musin when I plug earphones into the minidisk and the ...

...player where it isn't playing at all showing battery full, all wires are in correctly, I know full well the md im using works because it plays in my car radio, when i try to play a md in my portable ...