LG Flatron L1511S - TROUBLESHOOTING GUIDE: NO RASTER (MST9011)

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1. CHECK PIN122, 123
SOLDERING CONDITION
2. CHECK X501
3. TROUBLE IN U201
U201
POWER PINS
3.3V?
NO
CHECK U803, U801
U201
PIN122, 123
OSCILLATE AS
12MHZ?
CHECK CONNECTION LINE
FROM U201 TO U501
TROUBLE IN CABLE
OR LCD MODULE
CHECK 5VR LINE
U501 PIN8
5V?
YES
YES
YES
YES
3. NO RASTER (OSD IS NOT DISPLAYED) – MST9011
NO RASTER
(OSD IS NOT DISPLAYED)
U501
PIN41 IS 48KHz H-SYNC?
PIN42 IS 60Hz V-SYNC?
IS PULSE APPEARED
AT SIGNAL PINS?
NO
NO
NO