04-15-2018 05:02 PM
Welcome to Community@Insignia!
If you haven't already done so, try power-cycling your TV by turning it off and unplugging it for several minutes. This should serve to reset the TV hardware.
If the problem persists, your TV will likely need repairs. You can pursue service by carrying your TV in to your local Geek Squad. You may schedule an appointment by visiting We're Here to Help and selecting "Make a Reservation" under "Getting Help is Easy."