Most modern Android phones can be rebooted via a menu in the Quick Settings pull-down. If not, a power and volume button ...
1] Is your laptop fully charged? This is the first thing that you should do. Check if your laptop is fully charged or not. If the battery of your laptop is drained out completely, it will not turn on.
To fix the Power Button Lockout message on your HP Monitor, follow these suggestions: Check if the power button is stuck Disable the Power Button Lockout function Reset the monitor to factory settings ...