Read LG 19LV2300 (CHASSIS:LA86D) Service Manual online
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Check input connect JK600,JK601JK602,JK708
Can you see the normal waveform?
Replace JK600,JK601,JK602,JK708
Check DDC communication lines
(IC600,IC601, IC602, IC701_5&6 PIN must be 5V)
Replace the defective IC
Check HDCP communication lines
(IC102_5&6 PIN must be 5V)
Replace IC102
YES
YES
Check the output of PI3HDMI341ATR(IC600),
TMDS141RHAR(IC703).
Can you see the normal waveform?
Replace IC600 for HDMI 1/2/3
Replace IC703 for HDMI 4
YES
NO
NO
NO
NO
HDMI-Audio(In)
* Since HDMI AUDIO Data is contained with Video Data.
We cannot measure waveform for only Audio.
We can check I2S output from BCM3553(IC100).
This is explained after page Audio (Out).
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