Before considering a potential Hardware hardware defect and starting an RMA, you should at least follow these steps:
- Do a Factory Reset & Hypervisor recovery
- Use a different set of: "Monitor, Keyboard and Mouse"
- change the power supply
- change all cables
Problem: My VNC client shows only a black screen when behind a NAT or using the beroNet Cloud
Workaround: read VNC Guide carefully and use an external VNC Client if necessary.