Lenovo A2107A - Manual (Page 4)

Turning Off Your IdeaTab
Press and hold the Power button on your IdeaTab for about 1 second. The
Power off pop-up window will appear. Tap OK to turn off your IdeaTab.
NOTE: When connecting to a computer with a USB cable, make sure that the
battery power is sufficient for normal operation; otherwise, charge with the AC
power adapter before USB connection.
1-4 Activating/Deactivating the Display
Activating the Display
With the display deactivated, press the Power button on the IdeaTab to
activate the display. The IdeaTab's display will then illuminate, indicating that
it has been activated.
Deactivating the Display
If you do not need to use your IdeaTab temporarily, you can press the Power
button to deactivate the display. Your IdeaTab will then enter standby mode to
save power.
1-5 Screen Lock/Unlock
Screen Lock
Auto-Lock
You can set screen timeout by tapping Screen timeout in Display under
Settings. If there is no operation within the preset standby time, the
display will automatically deactivate, and your IdeaTab will be locked
automatically.