Panasonic TX-50CX700E Ehelp page 252

Updating the TV Software
Information
A new version of software may be released for download to enhance the
performance or operations of the TV.
If there is an update available and the channel has the update information, a
notification message is displayed.
To install new software, select
●
Standby:
Installs new software in standby condition.
Now:
Installs new software now.
Standby / Now and press
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OK to set.