ViewSonic VA2409-MHU User Manual page 19

Key
2 + 3 Press and hold the keys to lock/unlock the
When the menu appears on the screen, continue holding both
keys for 10 seconds to lock/unlock the
Power
If the
the screen:
1 + 4
Press the keys to display/hide the boot up screen when the device
(
«)
is turned on.
Description
Power Lock/Unlock
Locking Power Button
Press and hold for 10s
to lock power
button is locked, the below message will appear on
Power Lock/Unlock
Power Button Locked
Boot Up Screen On/Off
Press to turn on
19
Power
Power
button.
3
Off
button.