Working Build Fails to Display After Turning Off CSM (AsRock X470)

Jun 11, 2018
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Hi everyone,

Recently built a new computer:
- Mobo: AsRock Fatality x470
- CPU: Ryzen 7 2700x
- GPU: EVGA SC 1080Ti
- PSU: Enermax 650W
- RAM: GSkill FlareX 16GB 3200

The build itself went well, the PC booted up and Windows 10 was installed without problems.

However, today I installed Kubuntu on a second SSD, after setting the boot mode to UEFI only.

Windows 10 wasn't recognized in GRUB so I began experimenting with CSM support. After I turned it off (no booting in UEFI or Legacy) the computer seems to not boot.

Although the CPU cooler, GPU and other components turn on and seem to be running, no display is detected.

Currently checking the connections but don't think any came apart - is there anyway I can see the boot screen again?

Thanks for helping,