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Blank Screen after Apple boot logo

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Hi guys!


I had installed 10.8, 10.9, 10.10. without problems. But after update to 10.10.3 my PC do not want to boot. I tried clear Clover, Chameleon installation and not working. Last time I tried this method of installation OS X and I installed without problems (i do not use any flags), First boot (with USB installer) was fine, worked without any flags. I began to rejoice. I install bootloarder and kexts. After restart, OS X not boot. After Apple boot screen just blank screen. (no signal) I tried so many flags. GraphicsEnabler=Yes/No, PCIRootUID=0/1, IGPEnabler=Yes/No, npci=0x2000/3000 etc... but I can boot just with nv_disable=1 without graphics acceleration. 

So I tried install (on second HDD, just for test) Mavericks 10.9.0 and it worked fine. (with flags GraphicsEnabler=Yes PCIRootUID=1). 


My specs:


i5 2500k



installed on Intel SSD

HDMI to Full HD 

and Windows 7 on second HDD (unplugged when I installed OS X)


Where is problem? I am working on it last 4-5 days without success. Can you help me? I am desperate.

Thank you and sorry for my bad English. 

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What kexts did you install? Did you install them in S/L/E? (that stands for System/Library/Extensions)

Post your config.plist if you're using clover.

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Boot from the USB, use disk utility to try to repair permissions.

I'm not sure what the problem could be though. You say Mavericks booted fine. Try also using kext-dev-mode=1 and -v as boot flags. See if there's anything in the boot log that might give away the cause.

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