Vizio 55.73U01.001 V.1 Main Unit/Input/Signal Board 48.73U01.011 Please order by the part # below to ensure compatibility. Ordering by board # or TV model # will not guarantee compatibility with your unit. Please contact us with any questions: 55.73U01.001 V.1 Other Board #s and TV Model #s: 48.73U01.011, 11077-1 E320AR E322AR LWJAMMCN E322AR LWJAMMAN E322AR E322AR LWJMMMBN