Blackscreen after flashing mrchromebook UEFI

Hi All, I recently flashed my Dell 5430 (CROTA) with mrchromebook uefi to install windows. After completing setup I chose shut down and then it was just black screen afterwards. Tried external monitor also does not work. Any other method (blind method) that anyone can teach me? I dont have suzy q cable also :frowning:

then you need to obtain one.