1, bad speaker lead. It is usually caused by moldy voice coil leads or poor welding. When the paper basin vibrates frequently, the breakpoint is sometimes connected and sometimes disconnected, resulting in irregular faults of ringing and not ringing.

2. The voice coil lead is broken or will be short-circuited. The power amplifier output socket is not in good contact or the speaker input cable is broken.

3. There are sundries in the magnetic gap. If the debris enters the magnetic gap, the voice coil will rub against the debris when it vibrates, resulting in hoarse sound.

Reinstalling the driver is the right idea, and it is necessary to eliminate the fault of the player and ensure that the soft fault is eliminated.

Use external headphones or speakers to troubleshoot the hardware.

If it still doesn't work, it is recommended to find a professional computer maintenance company (it is not meaningful to suggest that you don't install the system all day, especially WIN7 takes a lot of time and is not the solution to the fundamental problem)