Read LG 47LG5010 / 47LG5020 / 47LG5030 (CHASSIS:LD84D) Service Manual online
C
2008
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Check inpu t connect J900 , J901,
J902
Can you see the norm al
wave form?
Check DDC communic ation
lines( IC900, IC901, IC903 Pin5,6 )
Check the input of HDMI
Seitch( IC902)
This s ignal is TMDS.
Can you see the norm al wave form?
YES
YES
NO
J900 , J901, J902
may have problem . Replace this Jack.
Check the output of HDMI
Swi tch( IC902).
Can you see the norm al wave form?
YES
YES
NO
After checking the trac e of TMDS lines and
pow er of HDMI Switch, you sho uld decide to
replace HDMI Switch or not.
NO
NO
After checking the Power of th is chip,
you sho uld decide to replace this or not.
After checking the Power of HDMI
Swi tch y ou sho uld deci de to repla ce
MST3361 or not .
YES
Check HDC P communication
lines( IC902)
NO
After checking the Power of th is chip,
you sho uld decide to replace this or not.
Check the output of Main IC(IC100).
Especial ly you sho uld check
The H,V s ync and cloc k.
Can you see the norm al wave form?
YES
NO
After checking the Power of Main
IC(IC100) you sho uld decide to replace
Main IC or not.
This board has big problem
because
Main IC(IC100) have some trouble s.
After checking thorou ghly all path once
again, You sho uld deci de to repla ce
Main Board or not.
HDMI doesn’t display
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