LG Flatron L1511S - TROUBLESHOOTING GUIDE: NO RASTER (DISPLAYED)

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CHECK U803, U801
U201
POWER PIN114(3.3V)
PIN111(2.5V)
?
NO
1. CHECK PC
2. CHECK SIGNAL CABLE
& D-SUB CONNECTOR
LINE
CHECK
R,G,B INPUT?
U201 PIN 33,30,28
NO
CHECK H-SYNC LINE
(D-SUB→U501 →U201
PIN126)
CHECK
H-SYNC INPUT
U201 PIN 126?
NO
YES
YES
YES
CHECK V-SYNC LINE
(D-SUB→U501 →U201
PIN127)
CHECK
V-SYNC INPUT
U201 PIN 127?
NO
YES
NO RASTER
(OSD IS DISPLAYED)
4. NO RASTER (OSD IS DISPLAYED) – MST9011
TROUBLE IN
LCD MODULE
YES