LG LB500J Service Manual page 16

4. NO RASTER (OSD IS DISPLAYED) – gmZAN2
NO RASTER
(OSD IS DISPLAYED)
YES
U201
POWER PIN
3.3V?
YES
CHECK
R,G,B INPUT?
U201 PIN 87, 91, 95
YES
CHECK
H-SYNC INPUT
U201 PIN 150?
NO
NO
NO
- 16 -
CHECK U802, U806
1. CHECK PC
2. CHECK SIGNAL CABLE
& D-SUB CONNECTOR
LINE
CHECK H-SYNC LINE
(D-SUB U701 MICOM
U201 PIN150)