My screen shows no signal, when I change video mode from Legacy to Uefi

[Microsoft Windows]

Hi, I want to enable secure boot and for that I have to disable CSM mode and to do that I have to change video mode from legacy to uefi, But the problem is when I change video mode from legacy to uefi and boot it my screen shows no signal and I have to take cmos battery out to reset the bios.Is there any solution?

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