Acer :: Acer 6920 - No Audio Output Device Found

Apr 7, 2010

I had vista installed on my laptop, Acer 6920, (first OS) and it was direct from factory so everything worked fine. I then installed ubuntu and everything still worked fine. I then deinstalled both of those to put on windows 7 RC where all my hardware was working perfectly (minus the fingerprint reader but i honestly couldnt care about that thing) so my computer eventually got pretty bogged down with crap to the point where boot was about 30 minutes. during this whole time my sound seemed to work, but near the end windows stopped finding any internal sound related hardware (the speakers and the mic). For other reasons i did a clean reformat (3 times) and reinstalled 7 Professional 32 bit and when i booted i downloaded all the drivers and everything seemed to install correctly, but when i rebooted the sound still didnt work nor did the mic. the exact error message windows is giving me is "No Audio Output Device found" however when i plug in a headset or a bluetooth adapter + headphones there is audio and it works perfectly. I really need sound to work as some programs crash if they dont detect a sound output and also for monitoring audio recordings.

I have tried installing all of Realtek's drivers. Literally all of them. None of them worked what so ever despite clean installs and deinstalls.

I now am running 64bit and ive almost given up on this problem. I bearly saved this computer and i dont wanna have to buy a new because of sucha stupid issue like this.
More info:

Under the hardware manager in windows there is no tree for sound devices. there was an unknown component which i put forceware on as i thought it was the sound device but no go.

DXDIAG:
Operating System: Windows 7 Ultimate 64-bit (6.1, Build 7600) (7600.win7_rtm.090713-1255)
Language: English (Regional Setting: English)
System Manufacturer: Acer
System Model: Aspire 6920
BIOS: Ver 1.00PARTTBL6
Processor: Intel(R) Core(TM)2 Duo CPU T7500 @ 2.20GHz (2 CPUs), ~2.2GHz
Memory: 3072MB RAM
Available OS Memory: 3070MB RAM
Page File: 1303MB used, 4835MB available
Windows Dir: C:Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7600.16385 64bit Unicode

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Acer :: ( 7520) No Audio Output Device Is Installed

Jun 16, 2009

I bought a laptop of type:

ACER ASPIRE 7520-5971

Systems Specs:
AMD Athlon 64 X2
384MB Nvidia Geforce 7000M
4GB DDR2

MOTHERBOARD:
MANUFACTURER: Acer
MODEL: Fuquene
CHIPSET: NVIDIA nFORCE 560

BIOS: Brand: Acer, V1.33

SOUND DEVICE: Realtek High Definition Audio.

PROBLEM:
Six Months Ago, the Sound Device Stopped Working, I get the following message (No Audio Output Device is installed): It is as if NO audio device is installed on the motherboard.

Here's the catch:
Sometimes when I START my computer the Device Works, and Sometimes It doesn't. If I restart the computer like 20-30 consecutive times (IF I'M LUCKY) chances that in one of these restarts the device MAY Work. Sometimes i go weeks without Audio.

Here are *some* things I've Tried:
1) Format the System:

Different OSs I've tried: Windows XP Home/Pro, Vista, 7 and Linux.

The expirience the same problem with all these OSs. So It's not an OS thing............

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My volume icon in the system try reads "No audio output device is installed." The audio device is not even recognized in the device manager (i.e. there is no yellow exclamation point or conflicted device to update a driver to). The system simply does not recognize the fact that a sound device exists.

I have tried many, many things:
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Quote:

Summary

Product Name
Aspire 6920
Operating System
Microsoft Windows Vista Home Premium , Service Pack 2
Processor
Intel(R) Core(TM)2 Duo CPU T5750 @ 2.00GHz
System Memory
4096 MB
Hard Drive...........................

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Well I just Bought the last saturday an acer gemstone blue 6920. The model with the intel gma x3100 and it came with Windows Vista Premium. The first thing that i did was to install the newest drivers of vga..i downloaded them from the intel website but the results were ugly..

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I have the above model and it seems to be performing quite nicely. However, what I've noticed on all Valve games is that after a few minutes, the frame rates drop from mid 70s-80s (low) to 10-15 regardless of whatever resolution, texture or ingame setting I change post this sudden drop. restarting the game makes the problem temporarily dissapear but is back within a few minutes. The effect is especially noticeable when there are about 30 zombies on top of you

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