How do mixing devices, I have no sound?

All the videos and computer sounds have ceased. Bought new headphones, but not sound.

Hello

Have you made changes on the computer before this problem?

The following article might be useful.
No sound in Windows
http://Windows.Microsoft.com/en-us/Windows/help/no-sound-in-Windows

Tags: Windows

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    ·         Do you see the sound card in Device Manager?

    ·         Connect various stakeholders?

    Method 1: Try to connect different speakers to this computer. Connect these speakers on another computer to check the issue.

    If the sound card and drivers are correctly installed, then it might be a problem with the speakers. Check the same.

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    1. you receive an error message?
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    http://Windows.Microsoft.com/en-us/Windows7/open-Device-Manager

    3. what operating system is running on your computer?
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    ·         What is the exact error message in Device Manager?

    ·         How long have you been faced with this problem?

    ·         Did you do changes on the computer before the show?

    ·         You have security software installed on your computer?

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    http://Windows.Microsoft.com/en-us/Windows/help/no-sound-in-Windows

    Method 2: I also suggest that you scan your computer with the Microsoft Security Scanner, which would help us to get rid of viruses, spyware and other malware

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    Hello Keno09,

    Thank you for your message.  We will check your audio driver.  Please follow these steps:
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    1. What is the number of brand and model of the PC?

    2. when the problem started?

    3. you remember to make changes to the computer before this problem?

    Step 1:

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    http://support.Microsoft.com/mats/NO_SOUND/

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    http://Windows.Microsoft.com/en-us/Windows-Vista/tips-for-fixing-common-sound-problems

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    Visit our Microsoft answers feedback Forum and let us know what you think.

    If this post can help solve your problem, please click the 'Mark as answer' or 'Useful' at the top of this message. Marking a post as answer, or relatively useful, you help others find the answer more quickly.

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    Hello

    1. have you done any change in software on the computer lately?
    2. What is the brand and the model number of the sound card?

    Method 1.
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    No sound in Windows
    http://Windows.Microsoft.com/en-us/Windows/help/no-sound-in-Windows

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    http://support.Microsoft.com/kb/307918

    I hope this helps.

    Thank you, and in what concerns:
    Shekhar S - Microsoft technical support.

    Visit our Microsoft answers feedback Forum and let us know what you think.
    If this post can help solve your problem, please click the 'Mark as answer' or 'Useful' at the top of this message. Marking a post as answer, or relatively useful, you help others find the answer more quickly.

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    Samhrutha G S - Microsoft technical support.

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    Ryan Thieman
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    Visit our Microsoft answers feedback Forum and let us know what you think.

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