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
Once finished, navigate to the page in the menu to confirm the new version number. Troubleshooting Update Issues Unic Uc40 Projector Software Update Download
Complete Guide to Unic UC40 Projector Software Update Downloads The Unic UC40 natively lacks an official license