Menu button blinking and changing by its own.

Menu button blinking and changing by its own. My 32” Sony LED Smart Tv have a problem in which the menu button keeps on appearing and disappearing by its own and sometimes changes the button from HDMI1 TO HDMI2 or TV Screen to Screen mirroring ,volume button increasing etc all by itself. What will be the reason and what will be the repair price? Any help please. ANSWERS:
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