Image and sound are not output from the TV when the receiver is not turned on.
Set [Control for HDMI] to [On], and then set [Standby Through] to [Auto] or [On] in the [HDMI Settings] menu.
Turn on the receiver, then select the input to which the playing device is connected.
If connected to other devices than those manufactured by Sony that support the Control for HDMI function, set [Control for HDMI] to [On] in the [HDMI Settings] menu.
Make sure the HDMI output setting is set to [HDMI A] or [HDMI A + B].