How to Perform a Hard Reset on PC
If the computer suddenly fails to start up properly, perform a hard reset as the first action. Performing the hard reset will correct many problems.
To perform a hard reset, first disconnect all peripheral devices and remove all external storage and USB devices. Disconnect the AC power adapter, remove the battery and then press and hold the power button for at least 20 seconds to drain all residual power and restore default start up settings.
Reconnect the AC power adapter (but do not insert the battery), press the power switch. If the computer starts normally after performing a hard reset, you are done troubleshooting.
To perform a hard reset, first disconnect all peripheral devices and remove all external storage and USB devices. Disconnect the AC power adapter, remove the battery and then press and hold the power button for at least 20 seconds to drain all residual power and restore default start up settings.
Reconnect the AC power adapter (but do not insert the battery), press the power switch. If the computer starts normally after performing a hard reset, you are done troubleshooting.