LG 42LG30 - Page 21

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Only for training and service purposes
LGE Internal Use Only
HDMI Video
Check input signal format
Is it supported?
Y
Check JK800 / JK801 / JK903
Replace Jack
Y
N
Y
Check HDMI Cable for damage or
open conductors
Check EDID NVRAM
(IC800, 801, 902)
Power & I2C Signal (#5, #6)
Replace the defective IC or re-
download EDID data
Y
N
Check HDCP Key NVRAM (IC102)
Power & I2C Signal (#5, #6)
Replace the defective IC
Y
N
Check HDMI Signal
Check signal line.
Y
N
Check IC802 Voltage Level 3.3V, 5V
& Output
Replace Power supply regulator
Or IC802
Y
N
Check IC802 Clock Signal
#26, #27
Replace IC802
Y
N
Replace Mstar(IC100)