Samsung LN32A550P3R Service Manual page 41

4-1-8. No Sound
Symptom Video is normal but there is no sound..
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When the speaker connectors are disconnected or damaged.
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Major
When the sound processing part of the Main Board is not functioning.
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checkpoints
Speaker defect..
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Diagnostics
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Caution Make sure to disconnect the power before working on the SMPS / IP Board.
Lamp(Backlight) Off, no sound.
Yes
Check the sound source and
check the connection of
sound cable?
Yes
Does the signal appear at R2002 ~
R2007 (PC, AV(Side AV), COMP1/2,
DVI), R5094 ~ R5101 (HDMI)?
Yes
Does the digital data appear at
R2041, R2044~R2046?
Yes
Does the signal appear at
L2001, L2002?
Yes
Check the Speaker?
Replace the Speaker?
Input a sound signal.
No
Check the connected cable.
Check IC2002 or Side-AV.
No
Change the main PCB ass'y or
side-AV assembly
Check IC5004
No
Change the main PCB assembly
Check IC2004
No
Change the main PCB assembly
No
Please, Contact Tech support
4. Troubleshooting
4-15