系统无正常音频输出和输入

I have some recommend steps to troubleshoot this isssue for you :

- Make sure you have completely remove all Audio Drivers

• Open Device Manager:
  • Right-click Start > Device Manager
• Expand “Sound, video and game controllers”
• Uninstall all audio devices listed (e.g., “Realtek Audio,” “Intel Smart Sound,” “Dolby,” etc.)
• Check the box: “Delete the driver software for this device”
• Expand “Audio inputs and outputs”
  • Uninstall everything there too
• Open “View” > “Show hidden devices”
• Remove any ghosted or grayed-out audio-related devices
• Reboot

- Then move to clean Driver Residue with DDU (Optional but Recommended)

• Download Display Driver Uninstaller (DDU) (It also works for audio driver cleanup.)
• Boot into Safe Mode (Settings > Recovery > Advanced Startup > Restart Now > Troubleshoot > Advanced > Startup Settings > Enable Safe Mode)
• Use DDU to remove Realtek, Intel, or Dolby audio driver leftovers
• Reboot into normal mode

- Next thing you should install Lenovo Official Driver Cleanly

• Go to Lenovo’s support page for your Y7000P 2025 model
  • Use your machine’s serial number to get the exact drivers.
• Download and install the latest:
• Realtek High Definition Audio Driver
• Intel Smart Sound Technology Driver (SST) (if present)
• Reboot and test again

- We can't skip this step to check Services and Audio Settings

• Run Services (Win + R → services.msc)
  • Ensure these are set to Running and Automatic:
    • Windows Audio
    • Windows Audio Endpoint Builder
• Sound Settings (Control Panel > Sound)
• On the Playback and Recording tabs:
  • Right-click and enable all disabled/hidden devices
  • Set defaults accordingly
  • Try playing the test tone again

- We should check on BIOS & UEFI Check this is the last resort, but we will another way if all of those steps above not working

• Reboot and enter BIOS (usually by pressing F2 or Delete during boot)
• Look for anything audio-related:
  • Make sure HD Audio or Onboard Audio is enabled
• Save and exit