Error "no audio output device installed" while trying to access the audio

Title: "no audio output device installed" on Satellite U305-S7448 with Windows 7

I have a 4.5 years old Satellite U305-S7448 with updates of Windows 7 has had "no audio output device is installed" and a red X over the icon. I uninstalled the Realtek driver and reinstalled. I still have the red X on the "speaker" icon and no sound. The problem happened after taking the laptop to a meeting. I got his back once, but he lost again after taking the laptop to another site again.

Hello

-Did you do changes on the computer before this problem?
 
Method 1: Follow the steps mentioned below and check if that helps.
(a) right click on the Volume in the Notification area icon.
(b) click the Read tab.
(c) right click on the box empty.
(d) select Show Disabled devices and disconnected devices
(e) click right speakers and select Enable.
(f) click right speakers and go to properties, select the option use this device under use of the device.
Tell him also to move the cursor up in the levels tab and the default value speaket.
Method 2: I also suggest you to check whether the audio service is running or not.
(a) click Start.
(b) type services and search for Windows Audio and Windows Audio Endpoint Builder services.
(c) ensure that both services are Automatic and started.
 
Method 3: Restore the system

Perform a restore of the system to a point prior to the show and check if this solves the problem.

What is system restore?

http://Windows.Microsoft.com/en-us/Windows7/what-is-system-restore

System Restore: frequently asked questions

http://Windows.Microsoft.com/en-us/Windows7/system-restore-frequently-asked-questions

Note: When you perform the system restore to restore the computer to a previous state, programs and updates that you have installed are removed.

 
For reference:
Tips for solving common audio problems
 
Hope this information helps.

Tags: Windows

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