Plz help me out i really like this tv i dont wanna.... i hav a locked up hisense tv model number

Question

i hav a locked up hisense tv model number TL2020 i cant fimnd a dam owners mannuel any f****n were as u can tell im pretty upset id like to fix this tv let me know what i can do to fix this probly b greatly aperciated has black screen that says LOCKED on the bottem of screen it happend wen i turnd it down wit my direct tv remote