Sony NET MD Minidisc Player MZ-N1 (Faulty)

• This is a used Sony MZ-N1 Minidisc player
• I have tested this and powers on with battery or mains but doesn't play minidiscs, it says 'no disc' 
• Mains power does charge the battery.
• The play button seems loose and the volume 'up' button isn't working, 'down' button works ok.
• No other tests completed
• The player has some scratches/scuffs and the lid is a bit loose.
• No other accessories included.
• Please see the photos for the condition.

Thanks for looking