1. What to do if the machine does not start and the screen is black?
2. How to deal with the situation that the sound quality of the machine is unclear, the sound quality is poor, or the volume is low?
3. How to deal with the situation that the machine is silent, but the screen shows, and the tape will move?
4. How to deal with the failure of the machine button?
5. How to deal with the distortion of machine sound?
6. How to deal with machine MP3 playing without sound?
7. How to deal with the machine without transcription function?
8. After the machine is connected to the computer, how to deal with the problem that the file cannot be downloaded normally?
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