Check the following items first if any problem happens.
1. Playing does not work and the LCD screen is not turned on.
- Check if the battery is correctly inserted.
- Replace the battery with new one.
- Charge the rechargeable battery.
2. Cannot hear any sound.
- Check if the memory file is saved.
- Check if the volume is set to 0 (zero).
- Check if the earphone is connected correctly.
3. The button key does not work.
- Check if the HOLD button is set.
