Verified answer

If you haven't already, unplug the TV for an hour or so and then try turning it on again. If the problem persists and you're within the retailer's return period, you may work with the store on an exchange. For warranty service if the return period has elapsed, please call Insignia Product Support for additional assistance and to schedule repairs under the factory warranty if needed. Contact information is available at the included link.

You need a service engineer.