No audio output device

[Violeta]

My HP Pavilion DV9000 laptop has no sound. During Device Manager does not show any sound. I had sound, it worked, but today I had nothing. I have a Windows 7 Ultimate on it. I do not understand anything. What could be the cause?
thank you

 

[Tmagic650]

Those HP dv9000's run hot and it is possible that the sound chip on the motherboard has failed... If this is the case, there should be a yellow exclamation point on the audio device driver in the device manager

 

[Violeta]

Hello,
I have no exclamation mark,nowhere
Thanks

 

[LookinAround]

List any Problem devices

• Make sure devices are connected and powered on
• Click Start->Run, enter: msinfo32. Click the + sign next to Components to expand it
• Click Problem Devices. Anything appear?
• If yes, click on it, Ctrl-A to select all, Ctrl-C to copy it, Ctrl-V to paste into next post
• On the other hand, if no devices are listed, tell me so

Generate and attach a DirectX report

• Click Start->Run, enter dxdiag and click OK
  ===> If you’re running 32 bit Windows, dxdiag will launch on its own
  ===> If you’re running 64 bit Windows, you’ll see 64-bit DxDiag. Click it to launch the 64-bit version of dxdiag
• Notice progress in lower left window corner
• When done, click Save Information button and save as a text file to your Desktop
• Attach it to your next post by clicking the Upload a File button