207.8. No Output SoundD-IN Play [Optical In]USB PlayBluetooth PlayTuner ModePress the Power Buttonof Unit or Remote Controlto Turn ON the UnitChange Main PCBNGPress PlayFL Display " D-IN"NGOutput Sound No ProblemFoundOK OK OKD-IN ModeChange input source to USBPress the Power Buttonof Unit or Remote Controlto Turn ON the UnitChange Main PCBNGInsert USB ThumdriveFL Display " USB"Press "Play"NGOutput Sound No ProblemFoundOK KOKOUSB ModeChange USB ThumdrivePress the Power Buttonof Unit or Remote Controlto Turn ON the UnitChange Main PCBNGPress PlayFL Display " BLUETOOTH "NGOutput Sound No ProblemFoundOK OK OKBluetooth ModeRe-connect Bluetoothinto the DevicePress the Power Buttonof Unit or Remote Controlto Turn ON the UnitChange Main PCBNGSearch for Tuner SignalNGOutput Sound No ProblemFoundOK OK OKFM ModeCheck the AntennaWire ConnectionChange DAMP PCBNG