: Occasionally, updates add support for more languages or better image adjustment options.
: Do NOT disconnect the power cable or remove the USB drive during the update. Interrupting this process can "brick" the device, making it unusable. Common Troubleshooting Issues hz-yg300.pdf - HAIZ yg300 firmware
: The update process usually takes several minutes. The indicator lights may blink during this time. : Occasionally, updates add support for more languages
Alternatively, some models show this by holding the button for 15 seconds until the OSD (On-Screen Display) info appears. Step-by-Step Guide: Updating via USB yg300 firmware