31Abnormal DisplayNo SoundCheck TV system setupReset sourceNGReplace the filter or resistanceRF signalCheck TunerReplace TunerCheck LVDS cableCheck inputReplace LVDS cableCheck panel Replace panelOKOKNGOKOKNGOKOKNGOKCheck the source Reset sourceNGOKCheck input signal TV SIF Check TVsystem Reset TV systemNGCheck TU501NGChange TU501Check U400OKOK Change U400NGCheck U600OKNG Change U600Check speaker NGChange speakerCheck if muteOKCheck signal filter circuitCheck the sourceOK