Screen goes in standby after Apple logo after OS X 10.9.3 update

[apple020997]

Hello!
I've just built an Hackintosh with these specs:
i5 4670
Gigabyte GA-Z87X-D3H
Inno3D GTX 760 Herculez 2000s
8GB DDR3
SSD 840 Evo (OS X)+Western Digital WD10EZEX (Win8.1 Pro+shared data)

The installation of Mavericks 10.9.2 (in the ssd) goes fine, and it works after the audio driver installaton. But if I install 10.9.3 the screen goes in standby after the Apple logo (it's a vga screen connected to the graphics card with a dvi-vga adapter). I've also tried to boot with the Intel HD 4600, but there's the same problem. Why does it happen????

Sorry for my English, but I'm Italian.

P.S.
When I change the computer model from Mac Pro 3.1 to others the Hackintosh will show a Kernel panic.

 

[omolo]

Oh wow,
I have the exact same MB & Video Card and the exact same problem.
The only difference is that my monitor is connected via dual-dvi link.

Tried to update yesterday but ended up reinstalling 10.9.2 back.
The only thing I would like to add is that even though display is not working I was able to type my password and press enter and sounded like the system was working just fine.

Would really appreciate any help. Thanks.

 

[byMike]

had the same issue today. and the solution was easy: deactivate the onboard graphic card in the motherboard's bios settings.

 

[carpentryplus25]

sometimes adding the boot flag dart=0 will solve this problem and will still allow you to use the onboard graphics along side of a graphics card if booting also with IGPEnabler=Yes

 

[vashcat]

Having the same issue, can't seem to find the Disable option for the onboard gfx.
Mother board - Gigabyte ga-z87-hd3

 

[vashcat]

Just an update, plugged the hackintosh into the HDMI / TV and it works.

 

[ilplaymo]

Same hardware for me, I was having the same issue
I solved switching "internal graphics" to Disabled
Try it