Morning!
(Well it is here anyway
)
Glad you found someone else with the same motherboard to compare BIOS settings with. Good news.
I'm not an expert but thought I'd download the config.plist and took a look anyway ...
From here there isn't enough in that config to get a system running, as far as I can tell. It looks just like the SMBIOS section in the main. It needs a LOT more in it.
Before those sections you need an RTVariables section to disable (partially or fully) the Apple CSR protection system.
You need a KernelAndKextPatches, a Graphics, a Boot and an ACPI section.
Maybe you just edited them out before posting? If so, sorry for misunderstanding.
Next up I see you have a system definition of 17,1 Personally I would try 14,2. The 17,1 def gives a black screen on boot unless you add extra kexts and tweaks, It makes things harder. Yes, it more closely matches the hardware and you can experiment later once you are up and running, but I'd change that.
(A note though: Changing Sys Def will change the serial number too, so I'd record all details (or backup the config.plist) before changing. You can then re-enter the serials afterwards to maintain your iCloud authorisation. Otherwise your hack will be treated as a new Mac etc.)
The prohibitory sign can be a boot-disk problem. So can an Error: 1234. For that, check the BIOS is choosing the correct boot-drive (if you have more than one physical disk in the PC etc).
Keep going!