Samsung LS27D590PS-ZA - Manual (Page 30)

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Connecting and Using a Source Device
2
2 Connecting and Using a Source Device
Connecting to Headphones or Speakers
Do not connect the power cable before connecting all other cables. Ensure you connect a source
device first before connecting the power cable.
1
Connect an audio output device such as headphones or speakers to [ ] port on the product.
This function is only available in HDMI mode.
The sound could only be heard when using a HDMI to HDMI cable.