I have checked the following:
-volume control and none of the mutes are select
-volume on speakers is on and turned up
-power is on to the speakers (power light on speaker is on)
-checked properties in Device Manager on SoundMax integrated Digital Audio and it shows 'use this device (enabled)'
-checked sound and audio device properties on the audio tab and verified that SoundMax is selected for playback
-verified in Device Manager that SoundMax properties showed 'use audio features for this device'