No video output after flashing full mrchromebox bios

I recently flashed the full mrchromebox bios on my taniks board and after reboot all of the lights turn on and the fans spin, however the screen stays black with a backlight. I attempted to use a usb c to hdmi adapter to see if it output any video but there was no output. I’m just wondering if there is any way for me to get this to work without reflashing my stock bios

reflash the UEFI firmware

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do you think the flash just failed or is it an issue with the hardware not being compatible?