When your OKM's Display freezes or shows a black screen, you can restart your OKM to resolve the issue.
- Remove the power cable and ethernet cable from the OKM.
The display may still show the screen that the OKM is frozen on, as it has an internal battery.
- Wait for 15-30 minutes until the OKM's battery runs out.
- Plug the OKM back into power and it should boot without issues.
This issue was resolved in a firmware update.
Please make sure that your OKM is on the latest firmware.