Enabling Secure Boot results in black screen on GIGABYTE Motherboard.

After Disabling CSM, I enabled Secure booth which resulted in a total black screen on startup(not even Motherboard logo, nor the option for BIOS shows up. Total Black Screen). Now I somehow re-disabled the secure boot by changing display ports, but I cannot find any way to enable Secure boot without making my screen blank on reboot. Kindly resolve the issue. Image shows my mobo, with latest firmware update. I have TPM enabled, but not secure boot.