LG 43LW540S - Communication Protocol Parameters; Command Reference List

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Only for training and service purposes
3. HDMI Video
Check the HDMI cable defect or
status of conductor
Check the EDID, I2C signal
HDMI1 : AR806
HDMI2 :AR805
Check the HDMI Jack
JK800, JK801
No
No
No
Yes
Yes
Yes
Check the HDMI_DET(HPD) signal
Exchange the IC or download
The EDID data
Exchange the HDMI Jack
Exchange the Resistor
R803,R808,R809,R814,Q800
Make sure the input signal type and
Our TV can support the signal
Yes
Check the voltage of
HDCP EEPROM /I2C
Signal : IC104
Check the HDMI signal
No
No
No
Yes
Yes
Yes
Check the LVDS signal output
Exchange the defective IC
Exchange the SoC(IC101)
Or Main board
Exchange the SoC(IC101)
Or Main board