9-3. Mainboard Failure CheckSymptom: No SoundNo Sound(All Mode)Check the inputSource Change Source inputCheck theinput/outputOf IC U13 of MainB/DSourceRe-soldering or changeIC U13Check theinput/outputOf IC U55 of MainB/DSourceRe-soldering or changeIC U55Check theinput/outputOf IC U2 of Main B/DSourceRe-soldering or changeIC U2Check theSpeakerChange the SpeakerCheck theSperker wireFailPassFailFailFailFailPassPassPassPassService ManualModel No.: HL42XLE253