Read LG 42LG5000 (CHASSIS:LD84D) Service Manual online
- 26 -
RGB PC doesn't displa
ay
Check J703 ,
Can you see the normal
waveform?
Check the input of RGB Audio
switch(IC1001) ,
Can you see the normal waveform?
Check the output of RGB Audio
switch(IC1001) ,
Can you see the normal waveform?
YES
YES
YES
NO
J703
may have problem. Replace this Jack.
NO
After checking the Power of RGB Audio
switch, you should decide to replace
RGB Audio switch or not.
NO
After checking the Power of RGB Audio
switch you should decide to replace
RGB 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.
Check the input of RGB Video
switch(IC700) ,
Can you see the normal waveform?
NO
After checking the Power of RGB Video
switch, you should decide to replace
RGB Video switch or not.
YES
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