LG 55WT30MS Service Manual page 17

2. No RASTER(OSD IS NOT DISPLAYED) - MAIN
NO RASTER
(OSD IS NOT DISPLAY)
CHECK LVDS Wafer
P1301/P1302 Connection?
YES
FET Q507 Voltage 12V ?
YES
CHECK INVERTER
VOLTAGE(24V)?
YES
LVDS Data and Clock
wave of IC4 Right?
YES
1. CHECK LCD module
2. CHECK T-CON BOARD
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Only for training and service purposes
NO
Change P1301/P1302 or LVDS cable
NO
CHECK IC6 Panel Control or change FET 507
NO
1. CHECK 14P WAFER and 14p CONNECTOR. change POWER BOARD
2. Check IC6 Inverter Control
NO
Check SCAILER IC4 ALL Voltage and Cristal X201 24Mhz
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LGE Internal Use Only