LG Flatron L1511S Service Manual page 13

4. NO RASTER (OSD IS DISPLAYED) – MST9011
NO RASTER
(OSD IS DISPLAYED)
YES
U201
POWER PIN114(3.3V)
PIN111(2.5V)
?
YES
CHECK
R,G,B INPUT?
U201 PIN 33,30,28
YES
CHECK
H-SYNC INPUT
U201 PIN 126?
YES
CHECK
V-SYNC INPUT
U201 PIN 127?
YES
TROUBLE IN
LCD MODULE
NO
NO
NO
NO
- 13 -
CHECK U803, U801
1. CHECK PC
2. CHECK SIGNAL CABLE
& D-SUB CONNECTOR
LINE
CHECK H-SYNC LINE
(D-SUB→U501 →U201
PIN126)
CHECK V-SYNC LINE
(D-SUB→U501 →U201
PIN127)