Diasonic Tech DMP-105 - Manual (Page 10)

Power ON/OFF
Using hold switch
If the hold switch is upward switch will not be operated.
Keep the switch upward when it's not being used or if you wish to
maintain the recording condition. Before turning the power on,
make sure hold switch is disabled.
HOLD disabled
HOLD
Switch will not be enabled.
Press play button for over 1seconds to turn the
power on and LCD display screen will appear
like picture on the side. While power is on,
press play button again for over 1second to turn
the power off.
If none of the buttons are pressed over 1minute
power will turn off automatically.
If power is turned on while the hold switch is at ON it will indicate
"HOLD ON", and power will shut off automatically. So, disable
hold and turn the power on.