I am looking for a way to connect the eDP connection from my laptop with a broken LCD, to any sort of other display. I am unable to get BIOS display on a display other than the internal laptop display. I have tried removing all of the internal displays hardware/drivers/controllers, but to no avail, the machine still thinks the display is there, not giving me any BIOS until windows has loaded and gives me the login screen animation via either the HDMI or VGA ports on the machine. My goal is to some how convert the eDP connection for the internal display, to an adapter that allows me to convert the "internal laptop display" into a port, for connecting a standard VGA/HDMI//DVI/Displayport screen. If I can get BIOS to display somewhere again, my plan is build an eGPU set up.
The machine is a Lenovo Y410p sporting a Haswell i7-4700MQ and an Nvidia GT755m. I have attached the motherboard Schematic. "CFG4" on page 8 seems like it may be an option, fully disabling the eDP and only having HDMI and VGA ports functioning connected in theory.
The only information I have found is a very expensive motherboard diagnostic tool that does this and a million other things i don't need, and for going the opposite direction of conversion.
b4989_lenovo-y410-viqy0.pdf