Check the Audio or video connection between the DVD player
and the TV. (example; composite red and white audio cables,
HDMI cable)
Turn on your TV and set the TV to the correct input the DVD
player is connected to on the TV.
During playback of DTS source, there will be no sound from
the speakers. Select a different audio source (e.g. Dolby
Digital). (for DVD-S700 model only) or please connect the unit
to an AV receiver that can decode DTS via an HDMI terminal, and
set “Audio Out” to “Bitstream". See
How to set Audio out to Bistream or PCM.