Why is there no sound on my computer all of a sudden, there is still no sound after restarting, and

1. Check whether the sound card, cable, speaker and other equipment are connected normally;

2. Right-click "My Computer" -- Properties -- Hardware -- Device Manager, and open "Sound, ** and Game Controller" to see if there is any yellow in front of you? "Or"! "If so, reinstalling the driver for this device will solve the problem;

4. When there is no sound and no speaker, open the control panel--- Add and remove programs--- add and delete Windows components, put a check mark in front of "Accessories and Tools", click "Next", and then, shut down and restart, the system will prompt you to install new hardware, follow the prompts to install;

5. Uninstall the sound card driver, reinstall or upgrade the audio driver;

6. When the sound card driver is installed, the prompt "AC chip cannot be found" appears, it may be that the computer is poisoned, or the sound card driver has been deleted by mistake due to illegal operation, or there is an internal software conflict. The solution is to reinstall the system and drivers.

7. Simply ignore it, wait for a period of time after shutting down and then turn it back on, sometimes the sound problem will solve itself. You might as well give it a try! 8.Some just restart your computer.

Check the headset's wiring.

Does the landlord have two kinds of integrated sound card and independent sound card? If there is, there must be a conflict, you must enter the BIOS and ban the integrated sound card.

If the driver of the sound card is lost, it is recommended that you use the driver wizard to update the driver.

Every time the computer boots up, you have to reinstall the sound card driver to have sound, in the case of no hardware failure, the reason for the failure is mostly due to the Windows audio service item is not set to boot up. It can be solved by following the steps below.

1. Right-click Start in the lower left corner of the system desktop, and click Run in the right-click menu;

2. In the run dialog box, type: , click OK or press the Enter key on the keyboard to open the local service;

3. In the local service window that opens, hold down the small slider on the right side with the left mouse button and drag it down to find: Windows Audio Endpoint Builder service item, and left-click and double-click: Windows Audio Endpoint Builder service item;

4. In the properties window of Windows Audio Endpoint Builder that opens, you can see that the service status of Windows Audio Endpoint Builder is: Stopped, click: Start(S);

Description: The Windows Audio Endpoint Builder service, which manages audio devices for the Windows Audio service. If you stop this service, your audio devices and effects won't work properly.

If this service is disabled, any service that explicitly depends on it will not be able to start.

5. After clicking Start and starting the Windows Audio Endpoint Builder service, the startup type (E) of the Windows Audio Endpoint Builder service is: Automatic, the service status is: Running, and then click:

Application - OK;

6. In the local service window, find the Windows Audio service item and left-click and double-click: Windows Audio Service;

7. In the properties window of Windows Audio opened, you can see that the Windows Audio service status is: Stopped, click: Start(S);

Description: Windows Audio Service, which manages audio for Windows-based programs. If this service is stopped, audio devices and effects will not work properly. If this service is disabled, any services that depend on it will not be able to start.

8. After clicking Start and starting the Windows Audio service, the startup type (E) of Windows Audio is: Automatic, the service status is: Running, and then click: Apply - OK;

9. Exit the local service, restart the computer, now you don't need to reinstall the sound card driver, the computer already has sound, and the computer has to reinstall the sound card driver every time you boot up to have the sound problem.

It may be caused by a different model of your sound card drive than your computer, or there is a problem with your computer system, and you need to start a new system.

I'll add to that in addition to the driving problem that my friend upstairs said.

Also pay attention to whether the audio in the BIOS settings is turned on (that is, after the normal boot, it will check whether there is a speaker icon in the lower right corner of the computer).

The sound card is generally on the driver of the main version

Put your master disc in it and install it

You accidentally turned off that little horn.