LG 42LG5010 Service Manual page 24

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AV1/2/3 doesn t display
Check J600,J600,JK607,JK618
Can you see the normal
Check the input of Video
Can you see the normal waveform?
Check the output of Main IC(IC100).
Especially you should check
The H,V sync and clock.
Can you see the normal waveform?
This board has big problem because
Main IC(IC100) have some troubles.
After checking thoroughly all path once
again, You should decide to replace
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Only for training and service purposes
waveform?
YES
switch(IC700).
YES
YES
Main Board or not.
J600,J601 or SIDE AV may have
NO
problem. Replace this Jack or SIDE
AV.
After checking the Power of AV switch
NO
you should decide to replace AV switch
or not.
After checking the Power of Main
NO
IC(IC100) you should decide to replace
Main IC or not.
- 24 - LGE Internal Use Only