Help Diagnosing Hackintosh Stuck On Boot Screen

Hi,

I recently had my perfectly working hackintosh (of two years) freeze on me. The image I was working on in photoshop starting flickering red and a kernal panic screen came up. I haven't been able to boot the computer successfully since.

I've been doing a bunch of research online and on these forums and am still unable to figure out the problem. No matter what boot flag I use the gray apple boot screen is immediately followed by a black screen. When I boot in verbose mode the computer doesn't get stuck on any command lines. I've tried photographing the final screens (which I'm attaching) to see if any find any errors and I haven't been able to. I've also tried reinstalling the os with a usb key.

I posted here earlier and someone suggested it might be a power supply issue. I just purchased a new power supply and it's had no effect. I've tried booting while all my storage drives are disconnected as well.

At this point I'm not sure what to do. Because booting in verbose doesn't tell me anything can I assume it's a hardware issue? And because it's not the power supply or the storage drives can I assume it's the video card? The motherboard?

Any guidance is greatly appreciated.

Thanks!

Hi,

I don't have anything attached to the usb hub so I don't think that's the issue.

The power supply doesn't shut down. The computer stays powered on it's just that the monitor looses a signal.

"UseKernelCache=No Graphics Enabler=Yes/No -v" or if that doesn't work "UseKernelCache=No Graphics Enabler=Yes/No -v -x -F" For Graphics Enabler chose Either option one doesn't work use the other. This is probably the problem that is occurring; I used to have the same problem but mine ended in KP these options sorted me out

The message is that there isn't any power getting to the hub, regardless of whether you have something connected. I've experienced boot failures when hd and usb (not required for boot) are expected to be mounted, but can't be. I'm assuming the usb hub is a pci or pci express card. Have you taken it out and tried booting? Certainly trying without kernelcache is worth a try too. Since you're running photoshop, I assume you have a fairly high-end graphics card. What are you using?

Hi again,

Thanks for advice.

I've tried every variation of boot flag you've suggested with no change.

I've even swapped out my graphics card from a 660ti to a brand new 760 gtx.

I have no idea what to do. Is there anyway I can just start over from scratch? Would it be a matter of installing a new boot drive? Or would I have to do something to the motherboard as well?

Thanks!

Matt

mkaelin said:

Hi again,

Thanks for advice.

I've tried every variation of boot flag you've suggested with no change.

I've even swapped out my graphics card from a 660ti to a brand new 760 gtx.

I have no idea what to do. Is there anyway I can just start over from scratch? Would it be a matter of installing a new boot drive? Or would I have to do something to the motherboard as well?

Thanks!

Matt

Click to expand...

Back to basics (if only to sort out everything). Would start off with selecting optimized in bios, turn off Bluetooth and Thunderbolt and only have the essential components (Nvidia display, ram and hdd / ssd connected. If you can successfully boot, start adding components one by one and make changes to bios settings one thing at a time until you see what causes the boot failure. If you still can't successfully boot with a barebones system, are you sure your boot HDD is not at fault? Did you clone the system to another HDD so you can disconnect your main boot drive and try to boot from the clone?