files. Ensure the lyric file has the exact same name as the song file (e.g., 1WorldSync Troubleshooting Tips
Short press to enter the main menu or submenus. Long press to switch between modes like Music and Voice. digital mp4 player zy model t1 user manual full
| Problem | Likely Cause | Solution | |---------|--------------|----------| | Won’t power on | Battery depleted | Charge for 30+ minutes | | | Frozen system | Press reset hole with pin | | No sound / distorted | Volume too low / earphones faulty | Adjust volume, test with other earphones | | Video won’t play | Unsupported codec/resolution | Re-convert to MP4 (H.264, 720x480 max) | | Computer not detecting device | USB cable loose / driver issue | Try another USB port; reinstall generic MTP driver | | FM radio poor reception | Earphones not plugged in | Insert earphones (they act as antenna) | | Screen flickers | Low battery or screen timeout | Charge battery; adjust backlight settings | | Problem | Likely Cause | Solution |
Connect the Micro USB cable to a computer USB port or 5V USB adapter. Red LED indicates charging; green LED indicates full. green LED indicates full.