After a manual USB update, old settings conflict with new code. Go to Settings > Device Preferences > Reset > Factory Data Reset . This cleans up the system.
: Ensure the projector is connected to a reliable power source. A power cut during an update can "brick" the device. how to update software on wanbo t6 max 200
or unplug the projector during the update process, as this can cause system failure. After a manual USB update, old settings conflict