HP Laptop not powering on

If your HP Probook is not powering on when pressing the person button you may need to perform a hard reset and a power drain

How to perform a hard reset on a HP Probook

1. Remove the Power cable
2. Hold down the power button and the F5 button simultaneously for 15 seconds.
3. Reconnect the power cable and try and power the computer back on.

If the computer is still not powering on proceed with performing a battery power drain.

How to perform a Battery Power Drain on a HP Probook

1. Disconnect the power cable from the laptop.
2. Hold down the Windows + Backspace keys simultaneously while pressing the power button once - continue to hold down the windows and backspace buttons for 15 seconds before releasing.
   If successful the computer should power on normally.
3. Connect the power cable if the computer powers on.