Thank you for your support of our products.

The conditions for the Cosmos 4K SE to enter standby mode are as follows:

1. Short press the power button on the device.
2. Short press the power button on the remote control.
3. No signal and no operation on the current HDMI interface for 10 minutes.
4. If no video is played and there is no operation for 20 minutes, the device will enter standby mode.
5. At the same time, you can manually set the time to enter standby mode without any operation in the system settings. It can be set to 15min, 30min, 60min. When the time is up, it will enter standby mode.
6. After entering standby mode, the device will enter STR standby mode(Deep standby) after a few tens of seconds.

If the above solutions cannot solve your issue, please contact Nebula Customer Support at support@seenebula.com for further assistance.