LG 32LD340H Service Manual page 52

Audio out Trouble shooting guide
Check the output of Mstar(IC101).
Measure waveform at R503, R504, R505.
because it's more easy to check. Can you see the normal signal?
YES
Check the input (Pin 17,18,19) of NTP7100(IC501).
Can you see the normal waveform?
YES
Check the output (Pin 30,31,36,37,47,48,53,54) of NTP7100((IC501).
Can you see the normal waveform?
YES
Check the speaker output wafer P501.
Can you see the normal waveform?
YES
Check the connector & Speaker
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Only for training and service purposes
This board has big problem because Main chip (MStar) have some troubles.
NO
After checking thoroughly all path once again,
You should decide to replace Mstar or not.
NO
After checking audio signal line, you should decide to replace item or
not.
NO
After checking the Power & I2C & Reset of this chip,
you should decide to replace this or not.
NO
After checking audio signal line, you should decide to replace item or not.
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