KEF LS50 Wireless II User Manual page 75

7. There is dropout from the Secondary Speaker.
• If the speakers are connected wirelessly, try to move them closer to each other.
• If the problem persists, connect the speakers with the inter-speaker cable and turn on
Cable Mode in the KEF Connect App.
8. The video and audio outputs from LS50 Wireless II are not in sync.
• If available, try the video delay function of your TV.
9. I have connected the speakers to the TV with an HDMI cable, why is there no
sound?
• Make sure the source is switched to TV for the speakers.
• Check the TV icon on the top panel of the Primary Speaker.
If the TV icon is blinking, the HDMI connection is not found. In this case, make sure that
the HDMI cable is connected to the eARC, ARC or CEC port of the TV.
If the TV icon is pulsing (fade in/fade out), only CEC (not ARC) connection is
established (TV may respond without sound). In this case, do the following:
• The HDMI CEC connection needs to be enabled on the TV. As manufacturers may
name this connection differently (e.g. Anynet+ for Samsung, Simplink for LG), please
check the user manual of your TV on how to turn on HDMI connection for your
TV. Once the HDMI CEC connection is enabled, the TV icon on the top panel
should turn solid (both CEC and ARC connections are now established).
• If there is only no sound but everything else is working, please make sure that the
audio output of HDMI is set to PCM (this is often set to Dolby Digital by default). As
the setting menu of each TV manufacturer is different, it may require some effort to
find out the right location in the menu to make the correct settings. Please refer to the
user manual of your TV.
• For HDMI eARC input, make sure the connecting HDMI cable is of high speed with
Ethernet to provide sufficient bandwidth and speed.
• Change the HDMI cable (our internal tests noticed that HDMI cables of lower qualities
may not be able to establish the connection).
• If the problem persists, please report the issue in the Support section of the KEF
Connect App for our investigation.
10. I have connected the speakers to the TV with an optical cable, why is there no
sound?
• Make sure your TV is set to output digital audio in PCM format.
• If the problem persists, try a different optical cable or connection option (e.g. HDMI).
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