Elo Touch Solutions ET1903LM User Manual page 19

OSD and Power Lockouts
Press and hold the "Menu" and "
pressing any of the Menu, Up, Down or Select keys will have no effect.
Press and hold the "Menu" and "
enabled, pressing the power switch will have no effect.
User Manual ET1903LM, ET2203LM, ET2403LM, ET2703LM
" buttons simultaneously for two seconds to enable/disable the OSD Locking feature. When OSD Locking is enabled,
" buttons simultaneously for two seconds to enable/disable the Power Locking feature. When Power Locking is
14