No Sound - Samsung LA40A350C1X Service Manual

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 M-star
-
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 232, 236,
234,237(I2S_CLK, I2S_SCLK, I2S_
LRCLK, I2S_DATA) of IC1201?
Yes
Check the DC 12V
of IC2001?
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 IC2001?
Yes
Replace the speaker ass'y?
Connect a sound cable.
No
control a volume.
Check a connection harness and
No
headphone jack./Side AV
Check Sound Processor
IC5001 (M-star)
Check a B12V Line.
No
Change a main PCB ass'y
No
Change a main PCB ass'y.
4. Troubleshooting
4-13