When dealing with computer faults, software is usually used first, then hardware. If there is no sound in your computer, please try the following solutions to check whether the sound card, cable and speakers are connected correctly. If you are infected with virus, you should run anti-virus software to carry out comprehensive anti-virus. Click Device Manager to see if there is a yellow exclamation mark or question mark icon in front of the sound card. If there are signs that the sound card driver is not installed correctly, please install the sound card driver.