The tray open/close button on the main unit is not responding. Pioneer Pioneer BD Player Blu-ray Disc Player BDP-3120 Only the main unit and remote control are included. This item was purchased used. CD, DVD, BD, and USB playback have been confirmed. Other network functions (LAN) have not been tested. The tray open/close button on the main unit is mostly unresponsive. Opening and closing operations are possible with the remote control. There are scratches and stains. There may be other undiscovered defects. Those who understand the condition, Thank you.