Acer laptop Win7 system no sound reason and solution summary

Acer laptop installed Win7 Ultimate system, if there is no sound, how to deal with it? Xiaobian explains the possible reasons and solutions for the lack of sound on the computer for everyone to check. First, the reason for the external speakers If you are using an external speaker, please make sure that the speaker is connected to the working power and is turned on, and make sure the volume is not 0, make sure the speaker is properly connected to the computer. 2. Check the computer jack on the speaker, making sure that the two ends of the computer cable are plugged into the correct jacks on the speakers and the computer (connecting the jacks of the sound card). Most sound cards have at least three jacks. Plug the speaker cable into the line out jack. This jack usually has a symbol that shows an arrow pointing away from the jack. If the jack is not marked, check the information that came with your computer to make the jack work. Most sound cards have at least one line out jack for connecting speakers, and a line out jack for connecting to audio input devices. 3. Speaker volume Make sure the speaker volume is not adjusted too low or muted. This is very important for laptops that typically have small speakers that are difficult to hear. 4. Volume bar Click to open the small speaker button on the right side of the task bar. In the “Volume” dialog box that appears, move the slider up to increase the volume, as shown in Figure 1:
Figure 1 Volume bar

V. Turn off mute to make sure the "Mute" button is not turned on. If mute is on, you should click this button to turn mute off. 6. Assuming the Acer laptop has a sound card, make sure the sound card is installed and working. You must log in as an administrator to perform these steps: 1. Right-click on the desktop and select “Device Manager” in the right-click menu bar, as shown in Figure 2:
Figure 2 Right-click Computer Device Manager

2. In the <;Device Manager" window, click <;sound, video, and game controller" to expand the information in the category. As shown in Figure 3:
Figure 3 Sound, video and game controllers

If a sound card is listed, it means that the sound card is already installed on the Win7 system. If the sound card is not listed, check the information that came with your computer to see if the sound card is installed. If a sound card is not installed, you will need to install one. You can add a sound card through Master Lu. PS: When you open Device Manager, if you are prompted for an administrator password or for confirmation, type the password or provide confirmation. PS: If you think you have installed a sound card, but you don't see the sound card under “Sound, Video, and Game Controllers”, use the left mouse button to double-click the “Other Devices” icon to check all the audio devices listed. . 7. If there is a yellow question mark next to the sound card name, it means there may be a problem with the sound card. 1. Right-click on the sound card name and click on “Attributes” in the right-click menu bar, as shown in Figure 4:
Figure 4 Sound Card Properties

2. In the Properties window, select “General” tab, then check the "Device Status" box to determine if there is a problem with the sound card, as shown in Figure 5: PS: If there is a problem, a new sound card driver is required.
Figure 5 Sound card property details

[Edit summary] If the above operations fail to solve the problem, it is likely that there is a problem with the sound card hardware, although in most cases the sound problem is caused by the driver Missing or expired, or caused by speaker problems. If you suspect a hardware problem, contact your computer or sound card manufacturer.