Good afternoon @userB8Tawma9xg
If the screen stays black after all that, I would contact us to get it repaired or replaced. You can reach out to us at 1 800 726 7864 or by using the Samsung+ application.
Important: Inspect the device for any physical or liquid damages.
If the watch has pixilation, horizontal lines or flickering to appear on the display, restart the watch to see if that fixes the issues. If the issue continues, verify the following:
The watch has the most recent software version installed and the apps are up to date. Connect the watch to a phone using the Galaxy Wearable app to check for updates.
Does the same issue occur on the startup screens after the watch is powered on?
Did the issue start after using a downloaded watch face when the Watch always on feature is on? It is recommended to change or uninstall the downloaded watch face.
Notes: The symptoms appear because some limited watch faces did not follow specific guidelines when they were developed. Samsung had already deleted some watch faces with problems from Galaxy Apps and notified the developer of the guide to follow. Samsung will manage watch face contents consistently.
If the issue occurred recently after installing third-party apps to the watch, uninstall the app(s), and then restart the watch.
Reset the watch to factory defaults. Backup data stored on the watch to the phone using the Galaxy Wearable app to prevent data loss.
If all of the above steps have been performed without resolving the issue, the watch will require service.