22 Introduction
TV front and side panel controls and connections
2 USB ports
1 Digital Audio jack
3 HDMI® ports
ARC HDMI®
only port
Power LED
Remote sensor
Ambient light sensor
(Sample Illustration) L7400U Series front and side panel controls and
connections

Front panel

1 Power On/Standby LED—Power indicator light, (glows green
when the TV power is On).
2 Ambient light sensor—This sensor detects the ambient light
conditions to optimize the backlighting levels, see “Ambient Light
Sensor” on page 103.
3 Remote Sensor—Point the remote control toward this remote
sensor, see “Remote control effective range” on page 46.

Left side

4 3 HDMI® Ports—High-Denition Multimedia Interface input
receives digital audio and uncompressed digital video from an
HDMI® device. HDMI® connection is necessary to receive 1080p
signals.
5 ARC HDMI® only port—Audio Return Channel (ARC) enables
the audio signal of the TV to be sent to an AV amplier via the
HDMI cable.
6 Digital Audio Jack—Optical audio output in Dolby® Digital, DTS®
or PCM (pulse-code modulation) format for connecting an external
Dolby® Digital and/or DTS® decoder, amplier, A/V receiver, or
home theater system with optical audio input.
7 2 USB Ports—Used to access video, music, or photo les with
USB device.
TV front and side panel controls and connections