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HP Recommended
ProBook 4440s
Microsoft Windows 10 (64-bit)

I was using the laptop last night until the battery died. I put it on the charger (brand new charger that I just purchased) and this morning when I pressed the power button, the fan immediately came on and the screen does not show anything. It is just a black. I tried to power off and hold the power button for 5 seconds to do the reset but nothing changed. Took the battery off for 5 minutes and put back on, and still nothing changed. 

1 REPLY 1
HP Recommended

This will not work for everyone, but you may be lucky?


HP Notebooks and Mobile Workstations -
No Power, No Boot, No Display When Power Button Is Pressed



NOTE: Be sure the battery is installed in the computer and it has sufficient power before continuing. Due to the design of the Embedded Controller/Keyboard Controller, the power supply must be disconnected and the computer must be powered with battery power to reset the Embedded Controller/Keyboard Controller.

Unplug the AC power from the computer.
Press and hold the power button for more than 12 seconds.
Release the power button (after at least 12 seconds).
The computer will power on and should boot normally after releasing the power button.
Re-connect the AC power to the computer.

NOTE: In case the battery is not charging after performing the steps to reset the Embedded Controller, unplug and re-plug in the AC power again.

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