I am trying to enable Secure Boot on the DragonBoard410c with Windows 10 IoT Core. I follow this Guideline https://github.com/MicrosoftDocs/windows-iotcore-docs/blob/master/windows-iotcore/secure-your-device/SecureBootAndBitLocker.md
With the Windows Tool you can build Test and Retail images. Retail Images are signed with Code Signing Certificates and the Test Image with test Certificates. It seems to work when i use an official Code Signin Certificate, but not with the test ones.
With the test ones, Secure Boot will be enabled, but only the SnapDragon Logo visible with the message to press any Key to shutdown. Any idea how I can debug the EFI Boot or get some kind of Log File?