Sony KDL-55W900A - Manual (Page 211)

TV screen feels warm.
Due to the thin profile of this television, the heat generated by the LCD
panel backlight and supporting electronics will be more noticeable. This is
normal operation and not a cause for concern.
Demonstration mode appears in the screen.
Press the OPTIONS button on remote control and select [Suspend Demo
Mode]. Then, press the HOME button on the remote control and proceed
with the [Initial Setup] from the [Settings] - [Preferences] menu. Be sure
to select [Home] from the [Viewing Environment] step.
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