How do I update the TV software?
If the TV is connected to the Internet, you may receive an update notification. To manually check for updates, press Quick settings > TV options > Settings > Device Preferences > About > System update > Internet and press OK, then follow the on-screen instructions. Alternatively, press HOME, select the Notifications icon from the top-right corner, and look for software update notifications. You need a high-speed broadband Internet connection for updates.
From the official Sony TV manual, page 17
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