hp probook 4540s stuk on black screen after clover boot screen

[ostadnart]

I have install yosemite on my brobook 4540s 1 or 2 years ago by clover guide and it worked for me very well till yesterday.from yesterday it stuk on a dark screen after clover bootscreen.i try to boot by using my instaler flash usb and it work.i try to install probook installer and it cant instal.this eror show to me:if you see this warning,that means:
1:you haven't pressed f4 at clover screen(i have pressed)
2:you haven't selected the right main model-specific patch(i have selected the right)
what can i do?

 

[RehabMan]

I have install yosemite on my brobook 4540s 1 or 2 years ago by clover guide and it worked for me very well till yesterday.from yesterday it stuk on a dark screen after clover bootscreen.i try to boot by using my instaler flash usb and it work.i try to install probook installer and it cant instal.this eror show to me:if you see this warning,that means:
1:you haven't pressed f4 at clover screen(i have pressed)
2:you haven't selected the right main model-specific patch(i have selected the right)
what can i do?

http://www.tonymacx86.com/hp-proboo...-install-yosemite-hp-laptops-clover-uefi.html

After installation...

Update Clover to the latest.
Update IntelBacklight.kext to the latest (see Projects link in signature).

Then rebuild cache:

sudo touch /System/Library/Extensions && sudo kextcache -u /

Then boot normally.