Never turn off the TV or unplug it while the update is in progress. Avoid Interactions:
Keeping your Panasonic TV firmware up to date can improve performance, add features, and fix bugs. Follow these steps to download firmware to a USB drive and update your TV safely. Panasonic Tv Firmware Update Usb Download
If your TV is still under warranty, Panasonic support can provide a specialized recovery USB. Never turn off the TV or unplug it