LG 32LH7000 - AV 1;2 Input Display Issues; Component Input Display Issues

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3. AV 1/2 doesn’t display
Check JK 200, JK20 1
Can you see the normal waveform?
NO
JK200, JK20 1 may have problem. Rep lace th is
Jack.
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 checking thoroughly all path once again,
You shou ld decid e to rep lace Main Bo ard or no t.
YES
4. Component doesn’t display
Check JK 304
Can you see the normal waveform?
Check th e in put o f Compo nent Audio
switch (IC405 in the Jack Bo ard),
Can you see the normal waveform?
Check th e output of Comp onent Audio
switch (IC405 in the Jack Bo ard) ,
Can you see the normal waveform?
YES
YES
YES
NO
JK304
may have problem. Rep lace th is Jack.
NO
After checking the Power of compone nt Audio
switch, y ou should decide to replace component
Audio s witch or not.
NO
After checking the Power of compone nt Audio
switch y ou should decide to replace component
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 thoro ugh ly all pa th onc e again,
You shou ld decid e to rep lace Main Bo ard or no t.
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