Windows 7 Headphones don't work on notebook.

[TheUser]

I have mixed optical spdif/analog external jack on FS Amilo notebook. So windows 7 have installed high definition audio device driver and detected two playback devices Speakers (internal atapi jack) and Digital Output Device SPDIF (rear panel optical jack). So if i plug my headphones to external jack i don't hear anything, optical out is active.
How to enable analog output (and disable optical) through external jack?

 

[ickymay]

have you tried going to control panel/sounds/playback then double click your device as listed which takes you to speaker properties and click the levels tab and enable disable outputs from there ??