HP LD4210 42-inch LCD Digital Signage Display - Manual (Page 68)

[Data] 0: Power Off
1: Power On
Acknowledgement
[a][][Set ID][][OK][Data][x]
To show the status of Power On/Off.
Transmission
[k][a][][Set ID][][FF][Cr]
Acknowledgement
[a][][Set ID][][OK][Data][x]
[Data] 0: Power Off
1: Power On
60 Appendix C Command reference ENWW