Use Disk Utility. Select the USB drive > Erase > Format: MS-DOS (FAT) .
Panasonic provides official firmware through its global support portal. Download Information of TV for North America | TV | Support
: This is typically found on a sticker on the back of the TV or within the same "About" menu. Step 2: Download the Firmware How to Update Software on Panasonic TV!
Before you begin, make sure:
Extract (unzip) the file on your computer. You should see a file named SDDL.SEC or something similar.
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