- 29 -● Using a non-certified HDMI cable may result in a blank screen or a connection error.● Some HDMI cables and devices may not be compatible with the TV due to different HDMI specifications.● This TV does not support HDMI Ethernet Channel. Ethernet is a Local Area Network (LAN) built with coaxialcables standardised by the IEEE.● Many computer graphics adaptors do not have HDMI ports, but have DVI ports instead. If your PC does notsupport HDMI video out, connect your PC with an HDMI-DVI cable." For more information, refer to "Connecting a Computer".Connection notes for audio devices● For better audio quality, it is a good idea to use an AV receiver.● If you connect an external audio device using an optical cable, the Sound Output setting is automaticallychanged to the connected device. However, to make this happen, you must turn on the external audio devicebefore connecting the optical cable. To manually change the Sound Output setting, do one of the following:– Use the Quick Settings screen to change to the connected device:Use the Select button to select Audio Out/Optical on the Sound Output menu. ( Settings updirectional button Sound Output).– Use the Settings screen to change to the connected device:Select Audio Out/Optical on the Sound Output menu. ( Settings Sound Sound Output).● An unusual noise coming from a connected audio device while you are using it may indicate a problem withthe audio device itself. If this occurs, ask for assistance from the audio device's manufacturer.● Digital audio is only available with 5.1 channel broadcasts.