Component Doesn’t Display - LG M227WD Service Manual

Component doesn't display
Check JK700.
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
Main Board or not.
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C
Only for training and service purposes
NO
YES
NO
YES
JK700 may have problem.
Replace this Jack.
After checking the Power of Main
IC(IC100) you should decide to replace
Main IC or not.
- 22 - LGE Internal Use Only