Sharp LC-40N5004U Quick Start Manual page 11

TV label Port Cable External Equipment Brief Description
Connect headphones to hear audio from the TV.
HEADPHONE
Headphones with microphones are not supported.
Connect an Ethernet cable to access a network
LAN or the Internet. The TV also has a wireless
connectivity feature.
LAN
SERVICE This port is not available for you to connect an external device. It can only be used by our factory for testing purposes.
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