Plug the projector directly into a stable wall outlet. Do not use loose extension cords. Power loss during an update will corrupt the mainboard chip.
The Unic UC40 natively lacks an official license for Dolby Digital (AC3) audio coding. If certain movie files remain silent after an update, it is a hardware limitation rather than a software bug. To bypass this, change the audio output settings on your input device (like an Amazon Fire Stick or Apple TV) from "Dolby/Surround" to PCM / Stereo . Important Safety Warning Regarding Third-Party Downloads Unic Uc40 Projector Software Update Download
Depending on your specific UC40 mainboard revision, use one of the two following methods: Plug the projector directly into a stable wall outlet
: Place the .bin firmware file directly into the root directory (main folder) of the USB drive. Do not put it in a folder. The Unic UC40 natively lacks an official license