Before downloading, check your current version by going to Settings > System Information > Firmware Information . If the version on the website is higher than your current version, you should proceed with the update. Step-by-Step Installation Guide
Once you've downloaded the firmware update file, follow these general steps: dmhz5350bt firmware update link
: Use a blank USB drive (FAT32 format) and extract the downloaded firmware zip file directly to the root directory. Before downloading, check your current version by going
: If the unit shows an error, try using a different USB drive or re-formatting the current one to FAT32. dmhz5350bt firmware update link