9
Locking the 4 Control Buttons
In the default condition, the 4 control buttons -- Volume Down, Volume Up,
Backlight Brightness Up, and Backlight Brightness Down -- are for users to
control.
To lock the 4 control buttons, refer to the following instruction.
To unlock the 4 control buttons, refer to the following instruction.
Setting the Power Button to “ON ONLY”
In the default condition, the power button is for you to easily power on or off
the HC-2021A/2021A-N. In order to avoid users from pressing the power
button by mistake to make the system shut down accidently, you can make the
system stay “always ON” by locking the power button.
To lock the power button, refer to the following instruction.
To unlock the power button, refer to the following instruction.
1
2
Press
the Volume Up and Backlight
Brightness Up buttons
sequentially
and then hold for 3 seconds
.
1
2
Press
the Volume Down and
Backlight Brightness Down buttons
sequentially and then hold for 3
seconds
.
1
2
Press
the Volume Down, Volume Up,
and Backlight Brightness Up
buttons
sequentially and then hold
for 3 seconds
.
3
1
2
Press
the Volume Down, Volume Up,
and Backlight Brightness Down
buttons
sequentially and then hold
for 3 seconds
.
3
