On a Windows Vista-based or Windows Server 2008-based computer, you perform a Digital Rights Management (DRM) test. If you select the Balanced power option when you configure the test, you can pass the test as expected. However, if you select the Power saver power option, you receive a message that resembles the following message:
Sony/Philips Digital Interconnect Format (S/PDIF) Support.
In this case, you can pass the test only after you connect some audio device to the line in port or to the line out port.