Thanks ReahbMan!
You gave me the same recommendation in Post #14, which I could not use because of the black screen which did not allow me to load the OS.
Try boot without caches. Boot with your USB if needed.
Update Clover to the latest.
Update IntelBacklight.kext to the latest (see Projects link in signature).
Then rebuild cache:
I removed the partition and made another installation. After I run the HP Probook 6.4.6 an error appears at the end of the installation (Probook first Installation.zip attached). Nothing happened, after that I could run the OS.
Later I run the HP Probook installer again (I did not selected the display resolution) because I had my screen resolution OK (Probook second installation-Black screen.zip attached ). Now I know that the HP Probook installer messed up the screen resolution when it's not selected and that's why I could not load the OS. Black screen came out after doing this.
I am posting this, maybe for someone with the same issue could solve it or avoid it.
In resume, if someone has to run the HP Probook installer, always select the screen resolution of the laptop.
I hope this post serve to report to the creators of the HP Probook installer to do not make anything to the Laptop's screen resolution if this option is not selected.
It looks like the it changes the clover, because when I boot from the usb selected from the clover menu the it goes to a black screen anyway.
The HP Probook installer message says "Press F4 at clover screen" which I did, but nothing happens.
Troubleshooting files attached too of the first installation (first error DirectHW.kext).
By the way, thanks again for the sound fix, it definitely helped me to get my sound working!
At the end I made my final installation which is running with my WiFi, Sound, screen resolution OK, my system boots as expected and I will use it like that