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50PT490B-SA, 50PT490B-SD (CHASSIS:PB11K) - LG TV Service Manual (repair manual). Page 58

Read LG 50PT490B-SA / 50PT490B-SD (CHASSIS:PB11K) Service Manual online

8. HDMI Video Trouble Shooting
Check Signal Format
Is it supported signal?
Y
Check HDMI Jack
JK803, JK804
N
Y
Y
Check HDMI Cable
Replace Jack
Check I2C Signal
R844/R845
/R858/R859/R848/R849/R862/R863
N
Replace It & Recheck
Y
Maybe Mstar S7(IC101)
has problems
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