9-3. Mainboard Failure CheckSymptom: No SoundNo Sound(All Mode)Check the inputSourceChange Source inputChecktheinput/outputRe-soldering or changeIC U13Checktheinput/outputRe-soldering or changeIC U55Checktheinput/outputRe-soldering or changeIC U2ChecktheSpeakerChange the SpeakerChecktheSperker wireFailPassFailFailFailFailPassPassPassPass51Service ManualModel No.: HL24XP1