On the MX-V5, there is no documented method to command the display to turn off the screen using RS-232/Room Control (as occurs when pressing the power button briefly). This would be a useful addition as it would allow the controller to turn the screen off whilst still allowing iQ 4 to run in the background and leave the OPS slot powered. The only current options are to use the power state commands to put the display into the standby or off power state, both of which stop iQ entirely and cut power to the OPS slot