4.Troubleshooting
■NoSound
Symptom•Videoisnormalbutthereisnosound.
MajorChecklist
•Whenthespeakerconnectorsaredisconnectedordamaged.
•WhenthesoundprocessingpartoftheMainBoardisnotfunctioning.
•Speakerdefect.
•SMPSnotsupplyingvoltagetothemainboard.
Diagnostics
Speaker
Speaker Cable
CN801
<Rearviewof43">
Ye s
Ye s
Ye s
Re place the S pe a ke r.
Re place the S MPS .
Is th e output volta ge of SMP S norma l?
(CN801 P IN 7 : 15V)
Re place the Main boa rd.
(1)
Is the s pe a ke r output terminal of
the Main board normal?
Conne ct the cable prope rly or
replace the ca ble, if ne ce s s a ry.
Is the ca ble connection be twe e n
Main boa rd a nd the s pe a ke r
prope rly connected?
No
No
No
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