LG FLATRON L1750S - Page 20

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CHECK U803, U801
U201
POWER PIN99(1.8V)
PIN33(3.3V)?
NO
1. CHECK PC
2. CHECK SIGNAL CABLE
& D-SUB CONNECTOR LINE
CHECK
R,G,B INPUT?
U201 PIN 70,74,77
NO
CHECK H-SYNC LINE
(D-SUB→U501→U201 PIN95)
CHECK
H-SYNC INPUT
U201 PIN 95?
NO
YES
YES
CHECK V-SYNC LINE
(D-SUB→U501→U201 PIN96)
CHECK
V-SYNC INPUT
U201 PIN 96?
NO
YES
NO RASTER
(OSD IS DISPLAYED)
4. NO RASTER (OSD IS DISPLAYED) – gmZAN3SL
TROUBLE IN
LCD MODULE
YES
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