LG 42LV4400 Service Manual page 66

COMPOSITE IS NOT DISPLAY CORRECTLY
Start
Input signal good?
P2 input correct?
U15 output correct?
LVDS output correct?
1. Check TCN1 & TCN2 Connect is good?
2. Is panel working ok?
END
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CONFIDENTIAL DO NOT COPY
N0
Yes
N0
Yes
N0
Yes
N0
Yes
Yes
1. Check video
2. Check DVD player
1.Check signal between P2
2.Check power 12V& 5V
1. Check U15 :DV33 & VCCK &
AV33 & AV125 & DDRV
2. Check Y1 is OK?
1. Check mini-LVDS cable
2. Check U15 clock (54MHz)
3. Check LVDS signal
Page 9-2
File No. SG-0000034