LG Flatron LCD 575LE

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CHECK U2, U24
U3
POWER PIN
3.3V?
NO
1. CHECK PC
2. CHECK SIGNAL CABLE
& D-SUB CONNECTOR
LINE
CHECK
R,G,B INPUT?
U3 PIN 87, 91, 95
NO
CHECK H-SYNC LINE
(D-SUB→U6→MICOM
→U3 PIN150)
CHECK
H-SYNC INPUT
U3 PIN 150?
NO
YES
YES
YES
NO RASTER
(OSD IS DISPLAYED)
4. NO RASTER (OSD IS DISPLAYED) – gmzanl