ViewSonic VX1755 User Manual page 18

Key Description
1 + 3 Press and hold the key to lock/unlock the
When the menu appears on the screen, continue holding the key
for 5 seconds to lock/unlock the
Power
If the
the screen:
2 + 4
Press and hold the key for 5 seconds to display/hide the boot up
screen when the device is turned on.
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
18
Power button.
Power
button.
3
Off