Samsung LE37A65*A Service Manual page 211

4-1-7. No Sound
Symptom Audio is normal but no picture is displayed on the screen.
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Check the RF Source
-
Major
Check the SEMT01(MT8226)
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
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Diagnostics
1
2
3
Caution Make sure to disconnect the power before working on the IP board.
Picture is display, no sound.
Yes
Does the signal appear at pin
#6, #4, #5, #12(MCLK, BCLK,
LRCLK, DATA) of IC2102?
Yes
Check the DC 12V
BD2107 of IC2104?
Yes
Does the signal appear at
Pin #47 or 48, #53 or
54(CH1_L, R Sound) And Pin
#36 or 37, #30 or 31
(CH2_L, R Sound) of IC2104?
Yes
Replace the speaker ass'y?
1
Connect a sound cable.
No
control a volume.
Check a connection harness and
No
headphone jack./Side AV
Check Sound Processor
IC2102 (MT8291)
Check a B12V Line.
No
Change a main PCB ass'y.
No
Please, Contact Tech support.
4. Troubleshooting
23
4-13