Before downloading heavy firmware files, try a hardware-level reset that can often clear corrupted temporary data:
A: The update may have reset audio settings. Go to Settings > Sound > Digital Output and switch from "Auto" to "PCM." Also check HDMI ARC settings.
If your TV is connected to the internet, try the built-in update tool first:
Place the file in the root directory of the USB drive. Do not put it inside a folder. 4. The Forced Update Procedure