HP PL4245N 42 inch HD-ready Plasma Television - Manual (Page 18)

12 Introduction
DVI-D and VGA Connectors
Connect a digital video cable for digital input signals from a PC monitor
connector, or from a digital cable or satellite receiver set-top-box.
Connect an analog RBG-type cable for analog input signals from a PC
monitor connector. See your component user documentation for
information about the connector types it supports.
Power Switch
Turns the AC power on and off. This switch is on from the factory. When this main power switch is off,
the TV is fully unpowered; the power/standby indicator light on the front of the TV is off, and neither
the front panel power button nor the remote control can be used to turn on the TV. If you turn the main
power switch off, wait at least 5 seconds before turning it on again.
RF IN and RS232C Connectors
Connect broadcasting (terrestrial) antenna or cable TV signal cable to the
RF IN connector.
This RS232 terminal is used for service only.