Connecting To An Audio System; Digital Optical Audio Connection - LG 55LW9800 Owner's Manual

1920 x 1080 is the recommended PC
resolution. If you use the TV in other video
modes, afterimages or distorted images
may appear on the screen.
Depending on the graphics card, DOS mode
may not work if a HDMI to DVI Cable is in
use.
In PC mode, there may be noise associated
with the resolution, vertical pattern, contrast
or brightness. If noise is present, change
the PC output to another resolution, change
the refresh rate to another rate or adjust the
brightness and contrast on the PICTURE
menu until the picture is clear.
The synchronization input form for
Horizontal and Vertical frequencies is
separate.
Depending on the graphics card, some
resolution settings may not allow the image
to be positioned on the screen properly.
If you experience overscan issues when
using HDMI-PC 1920x1080, change aspect
ratio to Just scan.
When selecting HDMI-PC, set the Input
Label - PC in the INPUT menu.
Connecting to an Audio
System
Use an optional external audio system instead of
the built-in speaker.
If you use an optional external audio device
instead of the built-in speaker, set the TV
speaker feature to off (See p.93).

Digital Optical Audio Connection

Transmits the digital audio signal from the TV to an
external device. Connect the external device and
the TV with the optical audio cable as shown in the
following illustration.
Do not look into the optical output port.
Looking at the laser beam may damage your
vision.
Audio with ACP (Audio Copy Protection)
function may block digital audio output.