Check the On-Screen Display (OSD) settings to see if the Standby Mode is set to Sleep Mode.
1. To Power on/off a DVLED display using RS232, switch the Standby Mode in the On-Screen Display (OSD) settings to Hibernate Mode.
2. The DVLED display must be in Hibernate mode in order to control the DVLED display.
Note: This requirement may differ from other product lines.