LG M4225C Owner's Manual page 67

RS-232C
Transmission / Receiving Protocol
16. Abnormal state (Command : z)
Abnormal State : Used to Read the power off status when Stand-by mode.
Transmission
Data FF : Read
Acknowledgement
0 : Normal (Power on and signal exist)
1 : No signal (Power on)
2 : Turn the monitor off by remote control
3 : Turn the monitor off by sleep time function
4 : Turn the monitor off by RS-232C function
8 : Turn the monitor off by off time function
9 : Turn the monitor off by auto off function
17. ISM mode(Command: j p)
Used to select the afterimage preventing function.
Transmission
Data 1H : Inversion
2H : Orbiter
4H : White Wash
8H : Normal
Acknowledgement
Controlling the Multiple Product
A12