I hope this can help you. First, make sure there is no problem with the hardware. If there is no problem with the speaker and the sound card, and if you have tested it on other machines and it is indeed in good condition, then you can continue reading. "Copying and reposting are strictly prohibited, Eagle in the Blue Sky" 2. Confirm that all connecting lines are completely correct. Then power on the speaker and turn on the volume switch. 3. Install the sound card driver correctly. If it is an onboard sound card, it is best to install the driver provided on the motherboard driver disk. (In fact, when the computer makes no sound, it is often because the sound card driver is incorrect. Generally, after the sound card driver is installed, there will be a small speaker icon in the taskbar in the lower right corner.) 4. If confirmed The driver is installed correctly, then take a look at the volume settings in the computer. The specific method is: double-click the small speaker icon in the taskbar, and in the pop-up "Volume Control" dialog box, check whether the volume in "Volume Control" and "Waveform" are turned to the minimum or set to mute. . If these two options are not available in the dialog box, please click the "Options" menu - select "Properties" - select "Volume Control" and "Waveform" in "Show the following volume controls", and then make the correct settings. . Note: Step 4 can only be set after the sound card driver is correctly installed. Special reminder: In fact, many times, the reason why the computer does not work properly is a minor problem or soft fault. After careful analysis, the problem can often be easily solved. DA