Enabling Video playback on C350
1. TV in Stand-by mode.
2. Go to Service Menu by pressing buttons on remote control:
INFO-MENU-MUTE-POWER (For LE models - Europe) MUTE-1-8-2-POWER (For LN and LA models - USA/Asia-Pacific)
3. Put in USB HDD/flash formated to FAT32.
4. In service menu go to Control - Hotel Option and click on Clone TV to USB, then if this done, push on remote control to return.
5. Enter to Option and change Model to LC450. Then go to back.(push on remote control to return)
6. Enter to Control - Config Option and change
HDMI to 1 Headphone to 0
(You have now again voice on your TV)
6. Restart your TV.
7. Turn Hotel Mode OFF.
8. Restart Tv again.
References
1. Topic on the forum.