Read LG 42LG5000 (CHASSIS:LD84D) Service Manual online
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Component doesn't display
Check J701.
Can you see the normal
waveform?
Check the input of Component
Audio switch(IC1001) ,
Can you see the normal waveform?
Check the output of Component
Audio switch(IC1001) ,
Can you see the normal waveform?
YES
YES
YES
NO
J701
may have problem. Replace this Jack.
NO
After checking the Power of component
Audio switch, you should decide to
replace component Audio switch or not.
NO
After checking the Power of component
Audio switch you should decide to
replace component Audio switch or not.
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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