Elo TouchSystems ET1502L User Manual page 21

OSD and Power Lockouts
Press and hold the "Menu" and " " buttons simultaneously for two seconds to enable/disable the OSD Locking feature. When OSD Locking is enabled,
pressing any of the Menu, Up, Down or Select keys will have no effect.
Press and hold the "Menu" and " " buttons simultaneously for two seconds to enable/disable the Power Locking feature. When Power Locking is
enabled, pressing the power switch will have no effect.
User Manual ET1002L, ET1302L, ET1502L 21