Asus A620BT soft reset

Hard reset Soft reset

Reset switch - allows you to perform a soft reset in case of device
malfunctions, or when an application hangs. Press the tip of the stylus on
the switch to reset the system.

Asus A620BT hard reset

Hold down the on/off button and the reset button on the back of the device simultaneously, then the device reboots with the set up screen.