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HDMI doesnt display
Check input connect J900 , J901,
J902
Can you see the normal
waveform?
YES
Check DDC communication
lines(IC900, IC901, IC903 Pin5,6)
YES
Check HDCP communication
lines(IC902)
YES
Check the input of HDMI
Seitch(IC902)
This signal is TMDS.
Can you see the normal waveform?
YES
Check the output of HDMI
Switch(IC902).
Can you see the normal waveform?
YES
Check the output of Main IC(IC100). Especially you should check
The H,V sync and clock.
Can you see the normal waveform?
YES
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.
NO
NO
NO
NO
NO
NO
J900 , J901, J902
may have problem. Replace this Jack.
After checking the Power of this chip, you should decide to replace this or not.
After checking the Power of this chip, you should decide to replace this or not.
After checking the trace of TMDS lines and power of HDMI Switch, you should decide to replace HDMI Switch or not.
After checking the Power of HDMI Switch you should decide to replace MST3361 or not.
After checking the Power of Main
IC(IC100) you should decide to replace
Main IC or not.
Copyright © 2007 LG Electronics. Inc. All right reserved. | - 27 - | LGE Internal Use Only |
Only for training and service purposes |
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