Set the Upgrade Mode to or Software (with bootloader) . Do not select "User DB" unless you are only updating a channel list.
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Unzip the downloaded firmware archive on your computer. Extract the raw .bin or .abs file. Set the Upgrade Mode to or Software (with bootloader)
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Select your firmware file from the screen and press or Start .
Set the upgrade type to or "Software + Bootloader" (depending on your preference and instructions). Press Start or OK .
The downloaded firmware file (usually ending in a .bin extension).