This thread is dedicated to connect you with Red Hat subject matter experts who can help answer your questions regarding Red Hat remote exams. Please see the following resources for Red Hat Remote Exams below:
For questions on scheduling or redeeming your exams, please use the Red Hat Certification team comment form here.
**Our subject matters experts in the Red Hat Learning Community will not be assisting with tasks related to scheduling exams.
I had exactly the same problem yesterday (2020-12-18) - black screen after "The onboarding process will..." message window. I have tried different network settings, other PC, lowering screen resolution... nothing solved an issue. About three hours before the exam and also few days ago, everything worked fine and successfully went through hardware compatibility test.