Panasonic Generation Plasma Display Television - Manual (Page 95)

Internal Test Patterns
To access the internal patterns, select [AGING] from the main adjustment
menu and press the [3] or [4] button of the remote control to select the
desired pattern.
To exit the Serviceman Mode , Press the Power button on the
TV or the Remote Control.
To exit the Serviceman Mode
, Press the Power button on the
TV or the Remote Control.
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