LG 22LN45 Series Service Manual page 18

6. No Video - HDMI
Check input signal format
Is it supported?
Y
Check HDMI Cable for damage
or open connector
Y
Check JK500,501
for proper connection or damage
Y
Check I2C Signal (JK500,501)
(#15, #16)
Y
Check HDCP Key (IC101)
7. No Audio
Make sure you can't hear any audio and
Device support the audio signal normally.
Y
Check Speaker and
its wire connection (P700)
and the resistance
Y
Check R4045 Voltage Level (3.3V)
Y
Check Signal from IC700
L700,L701, L706, L709
Y
Check Signal from IC101
SDA/SCL
(R703/R214, R707/R213)
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Only for training and service purposes
N
Replace connector
N
Re download EDID data
N
Replace Scaler(IC101)
N
Replace connector or Speaker
N
Replace IC807(3.3V)
N
Replace IC700
N
Replace IC101
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LGE Internal Use Only