LG 24BL450Y Service Manual page 13

No Video – HDMI
Check input signal format
Is it supported?
Y
Check HDMI Cable for
Damage or Open Connector
Y
Check JK101,JK102 for
N
proper connection or Replace Connector
Damage
Y
Check I2C
N
Re Download EDID Data
Signal(JK101,JK102)
Y
Replace Main Scaler (IC203)
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