首先檢查物理連接，重新插拔設備並測試不同端口或設備以排除硬件問題；2. 運行Windows音頻疑難解答自動修復常見問題；3. 在聲音設置中啟用並設置播放設備為默認輸出；4. 通過設備管理器更新、重裝或手動安裝最新音頻驅動；5. Realtek用戶需在音頻控制面板中啟用音頻插孔檢測功能；6. 必要時進入BIOS確保板載音頻控制器已啟用；7. 最後可通過重啟Windows音頻服務快速恢復功能，多數(shù)情況下該問題由驅動或設置錯誤引起，按步驟操作即可解決。

If you're seeing a "No speakers or headphones are plugged in" error in Windows—even when your audio device is connected—it can be frustrating, especially if sound was working before. This error usually points to a software, driver, or hardware detection issue rather than a physical problem. Here's how to fix it step by step.

1. Check Physical Connections and Hardware

Before diving into software fixes, rule out basic hardware issues:

• Unplug and re-plug your headphones or speakers.
• Try a different USB or audio jack port (especially if using a front panel or USB hub).
• Test your headphones on another device to confirm they're working.
• Try different headphones or speakers on your PC to isolate the issue.

? Some laptops have combo audio jacks (headphone mic). Make sure your headset is fully inserted and compatible.

2. Run the Audio Troubleshooter

Windows includes a built-in tool that can automatically detect and fix common audio problems.

Steps:

• Press Win I to open Settings .
• Go to System > Sound > Troubleshoot (under "Advanced").
• Run the Playing Audio troubleshooter.
• Follow the prompts and apply any recommended fixes.

This often resolves driver or configuration glitches.

3. Set Your Device as Default Playback Device

Sometimes Windows fails to recognize the plugged-in device as the default output.

Steps:

• Right-click the speaker icon in the taskbar and select Sounds .
• Go to the Playback tab.
• Look for your headphones or speakers (they might appear grayed out or disabled).
• Right-click the device and select Enable , then Set as Default .
• Click Apply and test the sound.

? If your device doesn't appear at all, proceed to driver fixes.

3. Update or Reinstall Audio Drivers

Outdated, corrupted, or missing audio drivers are a common cause.

Option A: Use Device Manager

• Press Win X and select Device Manager .
• Expand Sound, video and game controllers .
• Right-click your audio device (eg, Realtek Audio , Intel Smart Sound Technology , or High Definition Audio Device ) and select Update driver .
• Choose Search automatically for drivers .

Option B: Uninstall and Reinstall

• In Device Manager, right-click the audio driver and select Uninstall device .
• Restart your PC. Windows will reinstall the driver automatically.

Option C: Download from Manufacturer

• Visit your PC or motherboard manufacturer's website.
• Download the latest audio driver for your model.
• Install it manually for best compatibility.

4. Enable Audio Jack Detection (Realtek Users)

If you're using Realtek audio, the "front panel" or jack detection feature might be disabled.

Steps:

• Open the Realtek Audio Control Panel (search for it in the Start menu).
• Look for an option like Disable front panel jack detection or Jack Detection .
• Uncheck that option to enable detection.
• Plug in your headphones again.

? If you don't have Realtek Audio Control, download it from your PC manufacturer's site or use the Microsoft Store version.

5. Check BIOS/UEFI Settings (Rare but Possible)

In some cases, onboard audio might be disabled in BIOS.

Steps:

• Restart your PC and enter BIOS/UEFI (usually by pressing F2 , Del , or Esc during boot).
• Navigate to Advanced or Integrated Peripherals .
• Ensure HD Audio Controller , Audio Controller , or similar is Enabled .
• Save and exit.

6. Use Windows Audio Restart Trick

Sometimes restarting the audio service helps:

• Press Ctrl Shift Esc to open Task Manager .
• Go to Services tab.
• Find Audiosrv (Windows Audio service).
• Right-click and Restart the service.

Alternatively, open Command Prompt as admin and run:

 net stop audiosrv
net start audiosrv

Final Notes

• This error is rarely hardware-related if the device worked before.
• Updates (Windows or drivers) often trigger it, so rolling back a recent driver update may help.
• If using Bluetooth headphones , disconnect and re-pair them under Settings > Bluetooth & devices .

Fixing "No speakers or headphones are plugged in" usually comes down to driver issues or incorrect audio settings. Most cases are resolved by re-enabling the device in Sound settings or updating the audio driver.基本上就這些，不復雜但容易忽略細節(jié)。

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