LG 42LV4400 Service Manual page 67

COMPONENT IS NOT DISPLAY CORRECTLY
Input signal good?
P2 input correct?
U15 input correct?
LVDS output correct ?
1.Is TCN1 & TCN2 connected good?
2.Is panel working ok?
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CONFIDENTIAL DO NOT COPY
Start
N0
Yes
N0
Yes
N0
Yes
N0
Yes
END
1.Check video
2.Check host's setting
1.Check signal between P2
2.Check power 12V& 5v
1.Check signal between U15&P2
2.Check U15 Clock (54MHZ)
3.Check U15 :DV33&VCCK&AV33&AV125
1.Check U15
2. Check T-con power
3.Check mini-LVDS cable
Page 9-3
File No. SG-0000034