LG ProBeam BU53PST Owner's Manual page 144

Commands may work differently depending on model and signal.
01. Power (Command: k a)
ʢ Controls the *On/Off of the power supply to the projector.
Transmission (k)(a)( )(Set ID)( )(Data)(Cr)
Data 00: Power Off
Ack (a)( )(Set ID)( )(OK/NG)(Data)(x)
ʢ To Show projector is Power On or *Off
Transmission (k)(a)( )(Set ID)( )(FF)(Cr)
Ack (a)( )(Set ID)( )(OK)(Data)(x)
* As with other functions, when all the data is sent to "FF" in the format shown
above, Ack's data is sent as the response for the current status corresponding to
each function.
* With RS-232C cable, projector can communicate "ka command" in power-on or
power-off status. but with USB-to-Serial converter cable, the command works
only if projector is on.
01: *Power On
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