Lost all sound on my HP Pavilion dv6 notebook

I have a HP Pavillion dv6 notebook with a Widows 7 operating system and have lost all sound. Any suggestions as this is a 6 month old notebook?

I had the same issue last night after an automatic BIOS update. I read about 7 pages of posts that seem to deal with the same issue and found a combination of actions that seem to have restored my audio functions completely. I posted the solution and it resolved the issue for at least one other user who commented back. It it works for you, please also post that it worked for you. I suspect there are alot of users out there that have or will be experiencing the same issue. It would be nice if HP would post the appropriate solution, it seems to have been going on for awhile.
1. Through 'Device Manager / Sound, video and game controller' I uninstalled my audio driver (IDT High Definition CODEC) and also deleted the driver software for the device.
2. Through 'Programs and Features' I uninstalled the IDT Audio Software (vers 1.0.6418.0) that was installed with the BIOS update.
--> This forced a reboot.
--> When my system rebooted it automatically searched and found the appropriate audio driver -- now I've got audio and Media Center works fine...
Hope this helps you.
System Information:
HP Pavillion dv7 Notebook PC - Intel(R) Core(TM) i7-2670QM CPU @2.20GHz - 8.00 GB RAM
OS Name: Microsoft Windows 7 Home Premium
OS Version: 6.1.7601 Service Pack 1 Build 7601
OS Manufacturer: Microsoft Corporation
OS Configuration: Standalone Workstation
OS Build Type: Multiprocessor Free
Registered Organization: Hewlett-Packard
Product ID: 00359-OEM-8992687-00010
Original Install Date: 11/18/2011, 10:00:14 PM
System Manufacturer: Hewlett-Packard
System Model: HP Pavilion dv7 Notebook PC
System Type: x64-based PC
Processor(s): 1 Processor(s) Installed.
[01]: Intel64 Family 6 Model 42 Stepping 7 GenuineIntel ~2201 Mhz
BIOS Version: Hewlett-Packard F.1A, 6/22/2012
Total Physical Memory: 8,140 MB
Available Physical Memory: 5,420 MB
Virtual Memory: Max Size: 16,278 MB
Virtual Memory: Available: 13,297 MB
Page File Location(s): C:\pagefile.sys
Hotfix(s): 143 Hotfix(s) Installed.

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@rerateusa
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