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2. No OSD Trouble Shooting
Check 12V Voltage Level
at P801 #13 Pin
Y
Check 12V Voltage Level
at L801
Y
Check 12V Voltage Level at L909
Y
Check Voltage Level 2.5V at L827
Y
Check Voltage Level 1.8V
at IC802 #2 pin or L815
Y
Check Voltage Level 1.26V
at IC807 #6 pin
Y
Check P903
#16(TXAC-), #17(TXAC+),
#32(TXBC-), #33(TXBC+)
Y
Check LVDS Cable
Y
Check Voltage LCD Module
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Only for training and service purposes
N
Check Power connector
N
Replace one of L801/Q804
& Recheck
Replace one of
N
Q802/Q803/Q804/L801
& Recheck
N
Replace one of IC803/L824/L827
& Recheck
N
Replace one of IC802/IC805/L815
& Recheck
N
Replace IC807
& Recheck
Maybe BCM3556(IC100) or
N
7329A(IC901)
has troubles
N
Replace Cable
Y
Replace Power board
LGE Internal Use Only
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