The Sony DVP-FX730 is a portable CD/DVD player. This Japanese operating manual begins with safety warnings and battery precautions, then identifies the parts of the unit.
Instructions cover checking supplied accessories, using the car adapter, connecting to a TV, playing discs and MP3/JPEG files, adjusting the screen mode, changing settings, troubleshooting, playable discs, precautions, specifications, and warranty/after-sales service. This manual is written in Japanese.
Stop using it and ask the store where it was purchased or a Sony service window to repair it.
Ask the store where purchased or a Sony service window to replace it.