LG 32LH7000 - RGB PC Input Display Issues

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5. RGB PC doesn’t display
Check P300 ,
Can you see the normal waveform?
NO
JP300
may have problem. Rep lace th is Jack.
Check th e in put o f RGB Audio
switch (IC405 in the Jack Bo ard) ,
Can you see the normal waveform?
Check th e output of RGB Audio
switch (IC405 in the Jack Bo ard) ,
Can you see the normal waveform?
YES
YES
NO
After ch eckin g the Power of RGB Audio sw itc h,
you should decide to replace RGB Audio s witch
or not.
NO
After ch eckin g the Power of RGB Audio sw itc h
you should decide to replace RGB Audio s witch
or not.
Check th e output of Main IC(IC100).
Especially you sh ould ch eck
The H,V sync and c lock.
Can you see the normal waveform?
YES
NO
After ch eckin g the Power of Main IC(IC100) you
should decide to replace Main IC or not .
This bo ard has big problem because Main
IC(IC100) have some troubles.
After c hecking thoroughly all path once again,
You shou ld decid e to rep lace Main Bo ard or no t.
YES
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