LG 32LP560M Service Manual page 21

RGB-PC Video Trouble Shooting guide
Check input signal format.
Is it supported?
Y
Check AC cable for damage
For damage or open conductor
Y
Check P900
Can you see the normal waveform?
Y
Check the input of Mstar(IC101).
Measure waveform at R4025, R4042 because it's more easy to check.
Can you see the normal waveform?
Y
This board has big problem because Main chip (Mstar) have some troubles.
After checking thoroughly all path once again, You should decide to replace Mstar or not.
Analog RF Audio Trouble Shooting guide
Check RF cable & signal
Check tuner SIFoutput.
xxLP620H (TU3002 Pin#6)
xxLP645H (TU3001 Pin#1)
Y
Check Audio AMP output
L503,L504,L505,L506
Y
Check IC501
Y
Check C250
(SIF signal to IC101)
Y
Replace IC101
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Only for training and service purposes
N
Replace P900
N
Replace Tuner
N
Replace L503,L504,L505,L506
N
Replace IC501
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