Can't the handwritten version be used after the upgrade of Apple computer? No sound

There is no sound in the computer, which is a common fault, usually due to software and hardware.

Tools: computer and related software.

Steps:

First, the software

1, Mute: This is the least problem and the most easily overlooked one. Sometimes there is no sound in the computer, not the software or hardware of the computer, but the silence. The solution is simple. Just turn on the sound.

2. Sound card driver: This should be the first thing that many people think of when the computer has no sound. Indeed, this is also one of the culprits that often lead to the silence of computers. First find the sound device through the control panel, and then click the sound and audio device (please refer to the figure below for the specific location). If the pop-up interface is gray, the driver is not installed. Just download a driver and install it. If you don't know what to download, you can download and install a universal sound card driver.

3. Mute virus: It seems to be called waveform mute virus. The performance of this virus is: when the computer is turned on, it is silent, that is, there is no system startup sound, and the waveform audio is adjusted to the minimum, so it is impossible to play the sound. Even if it is adjusted, it will automatically mute after a few minutes. If it is caused by a virus, the solution is to kill the virus. You can kill virus in safe mode. If not, reinstall the system.

4. The service is not running: This should be a problem that many users easily ignore, that is, the audio service is turned off. Of course, it may not be intentionally turned off, but it is prohibited when the boot is optimized. The result is that the audio service is not started when the computer is turned on, so there is no sound in the computer. The solution is simple, just turn on the computer and start the audio service. The specific implementation method is to right-click my computer, click Manage, find the service option, double-click to enter, find the Windows audio option to see if it is turned on, if not, turn it on and set it to automatic.

Second, the hardware problem.

1. Interface problem: Whether you use headphones or stereo, you need to connect through a fixed interface. If the connected interface is poorly contacted or damaged, the computer will have no sound. If it is a desktop, you can try another interface to see if there is sound. If it is a notebook, you can unplug the headphones or stereo to see if there is any sound. If so, it can be determined that the interface is damaged. The solution is simple, just change the interface. If it is a notebook, it may be a little troublesome. Many of them have only one interface. If it is broken, you can't use the stereo or headphones. If you want to listen to sound with a stereo or headphones, you have to find someone to change the interface.

2. Headphone problem: If you are listening to sound with headphones, you should first try to change the interface if there is no sound. If there is no sound, you can change your headphones to watch it. If the other party's earphone has sound, it proves that the earphone is broken. The solution is simple, that is, change a headset.

3. Audio problem: If you listen to sound with a stereo, you must first eliminate the interface problem when there is no sound and ensure that there is no problem with the interface. Then there is probably something wrong with the stereo. You can switch to headphones to see if there is any sound. If there is, there is something wrong with the stereo. The solution is simple, that is, replace the stereo.

4, sound card problem: this is not easy to judge, to ensure that the above problems are not, then it may be the sound card itself. Whether the sound card is damaged needs professional maintenance personnel to judge. If so, the problem can only be solved by replacing the sound card.

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