Hdmi Doesn T Display - LG 37LG3000 Service Manual

HDMI doesn t display

Check input connect J900 , J901,
Can you see the normal
Check DDC communication
lines(IC900, IC901, IC903 Pin5,6)
Check HDCP communication
Check the input of HDMI
This signal is TMDS.
Can you see the normal waveform?
Check the output of HDMI
Can you see the normal waveform?
Check the output of Main IC(IC100).
Especially you should check
The H,V sync and clock.
Can you see the normal waveform?
This board has big problem because
Main IC(IC100) have some troubles.
After checking thoroughly all path once
again, You should decide to replace
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Only for training and service purposes
J902
waveform?
YES
YES
lines(IC902)
YES
Seitch(IC902)
YES
Switch(IC902).
YES
YES
Main Board or not.
NO
J900 , J901, J902
may have problem. Replace this Jack.
NO
After checking the Power of this chip,
you should decide to replace this or not.
NO
After checking the Power of this chip,
y ou should decide to replace this or not.
After checking the trace of TMDS lines and
NO
power of HDMI Switch, you should decide to
replace HDMI Switch or not.
NO After checking the Power of HDMI
Switch you should decide to replace
MST3361 or not.
After checking the Power of Main
NO
IC(IC100) you should decide to replace
Main IC or not.
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