mirror of the macbook pro to the HDTV without apple tv

I have a macBook Pro 2014 running a recent version of m of El Capitan.  I have "mirror" my Mac to an HDTV in the past.  The "Air Play" icon does not appear in the menu bar, even though I have this option checked in the display preferences.  Any suggestions?

Connect the HDMI cable. Airtime is not involved. the television becomes a mirrored display.

Tags: Notebooks

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