LG M4210L Owner's Manual page 61

RS-232C
Transmission / Receiving Protocol
39. DPM Select (Command : f j)
Set the DPM (Display Power Management) function.
Transmission
[f][j][][Set ID][][Data][Cr]
Data 0 : Off
1: On
Acknowledgement
[j][][Set ID][][OK/NG][Data][x]
40. Reset (Command : f k)
Execute the Picture, Screen and Factory Reset functions.
Transmission
[f][k][][Set ID][][Data][Cr]
Data
0 : Picture Reset
1 : Screen Reset
2 : Factory Reset
Acknowledgement
[k][][Set ID][][OK/NG][Data][x]
Controlling the Multiple Product
A23