Check JK700.
Can you see the normal
waveform?
YES
NO
JK700
may have problem.
Replace this Jack.
Check the output of Main IC(IC100).
Especially you should check
The H,V sync and clock.
Can you see the normal waveform?
YES
NO
After checking the Power of Main
IC(IC100) you should decide to replace
Main IC or not.
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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