ASUS All-in-One PC A431015Brightness up buttonPress this button to increase the brightness of yourASUS All-in-One PC.Power buttonPress the power button to turn your ASUS All-in-One PCon or off. You can also use the power button to put yourASUS All-in-One PC to sleep or hibernate mode andwake it up from sleep or hibernate mode.In the event that your ASUS All-in-One PC becomesunresponsive, press and hold the power button forabout four (4) seconds until your ASUS All-in-One PCshuts down.