I purchased an ASUS G51Jx-X5 gaming laptop a few months ago and have had no problem with the various sound inputs and outputs until now. Every now and then I use a USB DAC to feed my speakers and sometimes headphones. Ever since I changed the default device to the DAC, I've lost the ability to use my laptop's built-in speakers. I've tried a number of tricks to get them working again which include:
1) resetting BIOS and Realtek software defaults
2) Plugging in the DAC, shutting down, and unplugging before startup
3) Reinstalling all audio drivers
Here I tried changing specific binary values in the registry
5) Reinstalling Windows 7 (twice)
6) Using software to reassign audio endpoints as a work-around (see link above)
7) Trying different settings using the [Control Panel > Hardware and Sound> Sound] display
I know the speakers work because there is a startup screen before Windows is booted that plays a sound. The [Control Panel > Hardware and Sound> Sound] display shows 2 outputs: Speakers and Realtek Digital Output. The "Speakers" are the default and show changing volume levels whether or not headphones are plugged in or not. The headphone jack works.
Realtek Audio Driver 220.127.116.1183 R2.37
Has anyone else had a similar problem with audio endpoints in Windows 7 and Realtek software? I figure this might be a good place to ask as many of you use DACs regularly.
Thanks for any advice,