I was able to fix without advanced settings.
I couldnt hear anything in my headphones from any jack.
I went to device manager, enabled all, insured realtek hd audio enabled.
Made sure my headphone was plugged into the LINE OUT jack in the back of my computer. Think it is the green one.
went into asus realtek hd audio manager, went to cog in corner, then options. Set to AC97 front panel,
ticked mute rear device.., and most importantly ticked separate all input jacks. then returned to main screen and put speaker as default device, set the configuration to stereo and the amplifier setting to auto switch.
This worked for me.