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  #1  
Old November 25th, 2010, 02:29 PM
gwilym gwilym is offline
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O/S: Windows 7 64-bit
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Age: 75
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No audio output device ?

I have Prsario f700 laptop. Today the sound is gone. The sound icon has a red cross and says 'No Audio Output Device is installed'.
I have something called Driver Scanner Installed I,ve no idea where it came from! anyway I ran it and it says two drivers are missing:
NVIDIA GeForce 700/nForce 610M
Atheros AR5007 802.11b/gWiFi Adapter
I tried to find these with no luck, I did download one from nvidia center but it wouldent install, probably the wrong one.
Maybe this is not the cause anyway no idea, it,s worked fine for years.
Have tried System Restore that made no diferance.
Any help greatfully recived.
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  #2  
Old November 25th, 2010, 02:54 PM
Dodge's Avatar
Dodge Dodge is offline
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O/S: Windows Vista 32-bit
Location: Kentucky
Age: 46
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in the device manager what is the Audio called? It should have the name of your device listed there.

While in the device manager right click on your audio driver and uninstall it. Once its uninstalled, reboot the pc and let windows reinstall. See if it will work.

Post back with what the device manager says and we can help you find the correct driver.
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  #3  
Old November 25th, 2010, 05:11 PM
gwilym gwilym is offline
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device manager

Thanks for your help. I went to Device Manager then System devices the only thing in there that I connected with sound was System speakers.
In properties under 'general'
Device type....System device
Manufacturer.....(standard system devices)
Location.........on PCI bus
Status no drivers are installed for this device.

Under 'driver'
Driver provider Microsoft
Driver version 6.0.6002.18005
I tried to get driver details but it said not needed for this operation or something like that,
I tried to update driver but it said I had the latest available.
I uninstalled it then rebooted no change.

Strange that it said I had the latest version when elsewhere it says no drivers installed, I,m lost.
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  #4  
Old November 25th, 2010, 06:08 PM
gwilym gwilym is offline
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After doing the above I turned comp off and did some jobs.
When I turned it on again the sound was on, I put some music on it played for about a minute then went off again, things seemed to frezze up I restarted comp. The red cross was back on speaker icon.
When I loged off it said Explorer.exe is playing logoff sound do you wish to restart.
There was no sound,
I,m starting to wonder maybe I.ve got somesort of bug.
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  #5  
Old November 25th, 2010, 06:14 PM
gwilym gwilym is offline
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media player

This appeared when going on media player, dont know if it,s connected.


C:\Users\laptop\Desktop\youtube vids\Matt Cardle sings Baby One More Time - The X Factor Live show 3 - itv.com xfactor.flv::Audio
ffdshow Audio Decoder::Out
Audio Switcher::Out

Media Type 0:
--------------------------
Audio: PCM 44100Hz stereo 1411Kbps

AM_MEDIA_TYPE:
majortype: MEDIATYPE_Audio {73647561-0000-0010-8000-00AA00389B71}
subtype: MEDIASUBTYPE_PCM {00000001-0000-0010-8000-00AA00389B71}
formattype: FORMAT_WaveFormatEx {05589F81-C356-11CE-BF01-00AA0055595A}
bFixedSizeSamples: 1
bTemporalCompression: 0
lSampleSize: 1
cbFormat: 58

WAVEFORMATEX:
wFormatTag: 0x0001
nChannels: 2
nSamplesPerSec: 44100
nAvgBytesPerSec: 176400
nBlockAlign: 4
wBitsPerSample: 16
cbSize: 0 (extra bytes)

pbFormat:
0000: 01 00 02 00 44 ac 00 00 10 b1 02 00 04 00 10 00 ....DČ...▒......
0010: 00 00|00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0020: 00 00 00 00 00 00 00 00 44 ac 00 00 02 00 00 00 ........DČ......
0030: 00 00 00 00 61 75 64 73 00 00 ....auds..


Media Type 1:
--------------------------
Unknown

AM_MEDIA_TYPE:
majortype: MEDIATYPE_Stream {E436EB83-524F-11CE-9F53-0020AF0BA770}
subtype: MEDIASUBTYPE_None {E436EB8E-524F-11CE-9F53-0020AF0BA770}
formattype: FORMAT_None {0F6417D6-C318-11D0-A43F-00A0C9223196}
bFixedSizeSamples: 0
bTemporalCompression: 0
lSampleSize: 307200
cbFormat: 0
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  #6  
Old November 26th, 2010, 01:33 PM
gwilym gwilym is offline
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problem sorted

I read this somewhere so tried it, disabled all, then added them back one by one untill they were all back. I kept checking that the sound was still on.
Dont quite understand how it,s cured it because I put everything back on.
Anyway it,s all working fine at the moment.


1. Click Start, type MSCONFIG in the Search Bar and Press Enter to start the System Configuration Utility.

2. Click the Services tab, check the Hide All Microsoft Services box and click Disable All (if it is not gray).

3. Click the Startup tab, click Disable All and click OK.

4. Restart the computer and test the issue.



Please monitor the system in the Clean Boot environment. If the problem does not occur, it indicates that the problem is related to one application or service we have disabled. You may use the MSCONFIG tool again to re-enable the disabled item one by one to narrow down the problem.
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  #7  
Old November 27th, 2010, 05:53 PM
gwilym gwilym is offline
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not working again

The above made things work for a bit, now back to square one.
The red cross is back on speaker icon.
I have no sound.
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