LG LPA-172G, Service Manual

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3-3
DESPLAY CONDITION? INVERTOR ABNORMAL
Appear shadow form
interference in black background
There is only bring light.(LCD B/D abnormal)
Fuse Replace
IC(U1) Check and Replace
D2 ,D3 ,D8 Check
Main B/D on located
IC(U6) Check and Replace
A/V IN S/W Check
IC(U2) Check and Replace
IC(U3) Check and Replace
FUSE NORMAL?
IC(U1) NORMAL OPERAE
7.5V,15V,-14.5V NORMAL?
+5V NORMAL?
Y/C DISPLAY SIGNAL?
R. G .B SIGNAL OUTPUT?
VCOM SIGNAL?(5.5VPP)
YES
YES
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
LCD TROUBLE SHOOTING GUIDE