My tv is NOT the one I selected,

Model number not in list

47LN5400-UA

manufactured oct 2013

tried turning it off and on, tried to adjust he picture, but can barely see anything. Tried unplugging while holding down the power button for 30-60 seconds and plugging back in while button depressed, still no picture but with sound. It does this regardless of the input so I know it’s not my PlayStation or the cable box or the wii