I decided to format the hdd of the laptop in order to realize a clean install of a new OS system, taked the hdd apart and made the formatting in my pc.
When I connected the formatted hdd on the laptop again, it has no access to the BIOS menu, no codes, no sounds… just the lights of power supply, power button, and wi-fi are turned on.
I also replaced the CMOS battery thinking this could be the cause of the fail.
Now I´m trying to recover the BIOS using an external storage device following the instructions on the article, downloaded the file sp45070 but can´t go further than number 6 of Step 2: Creating the BIOS recovery media. After extracting the files to the USB a window shows the message "This BIOS is not for your Notebook PC", so the HP System BIOS Update Utility do not opens.