Sound TestScreen Menu > Support > Self Diagnosis > Sound Test Try NowUse the built-in melody to check for sound problems.If no melody is played by the TV’s speakers, make sure Speaker Select is set to TV Speaker and thentry again. If the problem persists, there may be a problem with the TV. Contact Samsung’s Call Centrefor assistance. If the melody is played, there may be a problem with the external device. Please checkthe connections. If the problem persists, refer to the external device’s user manual.Motion Control Environment CheckScreen Menu > Support > Self Diagnosis > Motion Control Environment Check Try NowTest the ambient noise and brightness levels to see if they are suitable for SMART Interaction use.Signal InformationScreen Menu > Support > Self Diagnosis > Signal Information Try NowThe signal Information displays the digital channel signal information and strength. Users can thenadjust the aerial to increase the signal strength and receive HD channels. This option is only availablefor digital channels.ResetScreen Menu > Support > Self Diagnosis > Reset Try NowThis resets all settings to the factory default settings except for the network settings. Select Reset,enter the PIN code when requested, and then select Yes. All settings are then reset. The TV turns offand on again automatically and then displays the Setup screen. For more information on resetting theTV, refer to the user manual that came with the TV.