Do you have a question about the VU LTDN55XT780XWAU3D and is the answer not in the manual?
Information on VESA hole pattern and screw size for wall mounting.
Connect an outdoor VHF/UHF antenna or cable to the TV.
Insert the CI+ module for watching scrambled services or HD channels.
Connect HDMI, Component, or AV cables from external A/V equipment.
Connect an HDMI cable for digital audio output to an audio receiver.
Connect an MHL cable from an MHL-enabled device, like a cell phone.
Connect headphones for audio out of the TV; built-in speakers are disabled.
Connect an optical cable for digital audio output to an audio system.
Connect USB devices for browsing, music, watching movies, or recording TV programs.
Connect TV to network via LAN cable to modem or router.
Connect TV to network wirelessly using a wireless router.
Instructions for opening the compartment and inserting AAA batteries.
Specifies the optimal distance and angle for remote control operation.